1 An anionic surfactant particle for use in a laundry detergent composition, the particle having a total anionic surfactant content of at least 95 wt % and comprising linear alkylbenzene sulphonate (LAS) and primary alcohol sulphate (PAS) in a weight ratio of from 5:1 to 1:3.
2 An anionic surfactant particle as claimed in claim 1, having a total anionic surfactant content of at least 98 wt %.
3 An anionic surfactant particle as claimed in claim 1 or claim 2, wherein the ratio of LAS to PAS is within the range of from 3:1 to 1:2.
4 An anionic surfactant particle as claimed in claim 1, having an inorganic salt content not exceeding 2 wt %.
5 An anionic surfactant particle as claimed in claim 1, wherein the PAS has an average alkyl chain length within the range of from C10 to C16, preferably from C12 to C14.
6 An anionic surfactant particle as claimed in claim 1, wherein the anionic surfactants are in sodium salt form.
7 An anionic surfactant particle as claimed in claim 1, which is the form of a flake.
8 A process for the preparation of an anionic surfactant particle as claimed in claim 1, which comprises the steps of
(i) reacting LAS acid with sodium carbonate to form sodium LAS and water,
(ii) admixing PAS in any suitable form,
(iii) drying the resulting mixture to a solid form, and
(iv) comminuting to form particles.
9 A particulate detergent composition comprising an anionic surfactant particle as claimed in claim 1, in admixture or conjunction with one or more other solid detergent ingredients.
10 A particulate detergent composition as claimed in claim 1, which comprises
(a) a base powder composed of composite granules comprising surfactant and builder,
(b) anionic surfactant particles as claimed in claim 1,
(c) optionally postdosed detergent ingredients.
11 A particulate detergent composition as claimed in claim 10, having a total anionic surfactant content of at least 20 wt %.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for supporting a handoff of a mobile node from a first agent of a first network to a second agent of a second network, the method comprising the steps of:
upon initiation of the handoff, sending a first message to the first agent requesting the first agent to buffer at the first agent all packets being sent to the mobile node, wherein the first message is part of a registration request protocol to the second agent;
completing the handoff of the mobile node to the second agent; and
responsive to the completing, sending a second message to the first agent requesting the first agent to forward the packets buffered at the first agent to the second agent, wherein the second message is also a part of the registration request protocol.
2. The method of claim 1 wherein the second message occurs after the second agent has been authorized.
3. The method of claim 1 wherein the first and second networks are mobile internet protocol networks.
4. The method of claim 3 wherein the second agent is a foreign agent to the mobile node.
5. The method of claim 1 wherein the mobile node sends the first message to the first agent.
6. A computer program product for facilitating a handoff of a mobile node from a first agent to a second agent, the computer program product comprising a computer-readable medium having stored thereon computer-executable instructions for:
determining that the handoff is to be initiated;
before a transmission of a handoff request message, sending a first message to the first agent requesting the first agent to buffer at the first agent any packets being sent to the mobile node, wherein the first message is part of a registration request protocol to the second agent;
completing the handoff of the mobile node to the second agent; and
responsive to the completing, sending a second message to the first agent requesting the first agent to forward the packets buffered at the first agent to the second agent, wherein the second message is also a part of the registration request protocol.
7. The computer program product of claim 6 wherein the second message occurs after the second agent has been authorized.
8. The computer program product of claim 6 wherein the first and second networks are mobile internet protocol (IP) networks.
9. The computer program product of claim 8 wherein the second agent is a foreign agent to the mobile node.
10. The computer program product of claim 6 wherein the second agent sends the first message to the first agent.
11. The computer program product of claim 6 wherein the computer-readable medium further has stored thereon computer-executable instructions for sending, by the mobile node, a buffer control request.
12. The computer program product of claim 6 wherein the computer-readable medium further has stored thereon computer-executable instructions for sending an indicator to the second agent that the mobile node has requested buffering.
13. The computer program product of claim 6 wherein the first message includes an indicator of a buffer size.
14. The computer program product of claim 6 wherein the computer-readable medium further has stored thereon computer-executable instructions for:
discarding, by the first agent, predetermined packets when a maximum number of packets have been received.
15. The computer program product of claim 6 wherein the computer-readable medium further has stored thereon computer-executable instructions for:
signaling the first agent to delete the buffered packets.
16. The computer program product of claim 15 wherein the computer-readable medium further has stored thereon computer-executable instructions for:
signaling forwarding any packets received after the buffered packets are deleted.
17. The computer program product of claim 6 wherein the first message includes an indicator of a maximum length of time that buffering is needed.
18. The computer program product of claim 6 wherein the first message includes an indicator of authenticity for the buffering.
19. The computer program product of claim 8 wherein the first message includes an IP filter to identify certain packets that do not need to be buffered.
20. A computer program product for a new agent of a new network to initiate communication with a mobile node, the computer program product comprising a computer-readable medium having stored thereon computer-executable instructions for:
determining that the mobile node is in handoff from an old agent to a new agent;
sending a first message to the old agent requesting the old agent to buffer at the old agent any packets being sent to the mobile node, wherein the first message is part of a registration request protocol to the new agent;
completing the handoff of the mobile node to the new agent; and
responsive to the completing, sending a second message to the old agent requesting the old agent to forward the packets buffered at the old agent to the new agent, wherein the second message is also a part of the registration request protocol.
21. The computer program product of claim 20 wherein the old and new networks are mobile internet protocol networks.
22. The computer program product of claim 20 wherein the new agent is a foreign agent to the mobile node.
23. The computer program product of claim 20 wherein the first message is sent by the mobile node.
24. The computer program product of claim 20 wherein the new agent sends the first message to the old agent.
25. A system for supporting a handoff of a mobile node from a first agent of a first network to a second agent of a second network, the system comprising:
means for sending, before a transmission of a handoff request message, a first message to the first agent requesting the first agent to buffer at the first agent any packets being sent to the mobile node, wherein the first message is part of a registration request protocol to the second agent;
means for completing the handoff of the mobile node to the second agent; and
means responsive to completing the handoff for sending a second message to the first agent requesting the first agent to forward the packets buffered at the first agent to the second agent, wherein the second message is also a part of the registration request protocol.
26. The method of claim 25 wherein the second message occurs after the second agent has been authorized.
27. A computer program product for facilitating a handoff of a mobile node from a first agent to a second agent, the computer program product comprising a computer-readable medium having stored thereon computer-executable instructions for:
determining that the handoff is to be initiated;
the second agent sending a first message to the first agent requesting the first agent to buffer at the first agent any packets being sent to the mobile node, wherein the first message is part of a registration request protocol to the second agent;
completing the handoff of the mobile node to the second agent; and
responsive to the completing, sending a second message to the first agent requesting the first agent to forward the packets buffered at the first agent to the second agent, wherein the first message is part of a registration request protocol to the second agent.
28. The computer program product of claim 27 wherein the second message occurs after the second agent has been authorized.