US3257340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersion polymerisation of monomer in presence of alkyl mercaptan
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1961-05-01
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Granted: 1966-06-21
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Expires: 1981-05-01
Abstract
No abstract record available.
Inventors
- 👤 Osmond Desmond Wilfrid John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:02
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/04; C08F2/06; C08F2/08; B; B02; B02C; B02C13/00; B02C13/02; B02C13/04; Y; Y10; Y10S; Y10S524/00; Y10S524/924; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31641; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN A PROCESS FOR PRODUCING A STABLE DISPERSION OF A SOLID POLAR ADDITION POLYMER IN AN INERT, RELATIVELY NONPOLAR ORGANIC LIQUID IN WHICH THE POLYMER IS INSOLUBLE WHICH COMPRISES POLYMERISING AT LEAST ONE ETHYLENICALLY UNSATURATED MONOMER WHICH IS POLYMERISABLE BY ADDITION POLYMERISATION IN SAID ORGANIC LIQUID IN THE PRESENCE OF A CATALYST FOR THE POLYMERISATION OF SAID MONOMER AND A COPOLYMERISABLE POLYMERIC SOLVATED CONSTITUENT WHICH IS SOLUBLE IN SAID ORGANIC LIQUID AND FORMS A MEMBER OF TEH GROUP CONSISTING OF BLOCK AND GRAFT COPOLYMER WITH SAID MONOMER TO FORMSAID STABLE DISPERSION OF SOLID POLYMER IN ORGANIC LIQUID; THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE POLYMERISATION IN THE PRESENCE, IN THE SOLUTION, OF AN ALKYL MERCAPTAN IN WHICH THE ALKYL GROUPS CONTAIN 4 TO 9 CARBON ATOMS.
Claim 2
Dependent Claim
126 words
IN A PROCESS FOR PRODUCING A STABLE DISPERSION OF A SOLID POLAR ADDITION POLYMER IN AN INERT, RELATIVELY NONPOLAR ORGANIC LIQUID IN WHICH THE POLYMER IS INSOLUBLE WHICH COMPRISES POLYMERISING AT LEAST ONE ETHYLENICALLY UNSATURATED MONOMER WHICH IS POLYMERISABLE BY ADDITION POLYMERISATION IN SAID ORGANIC LIQUID IN THE PRESENCE OF A CATALYST FOR THE POLYMERISATION OF SAID MONOMER AND A COPOLYMERISABLE POLYMERIC SOLVATED CONSTITUENT WHICH IS SOLUBLE IN SAID ORGANIC LIQUID AND FORMS A MEMBER OF TEH GROUP CONSISTING OF BLOCK AND GRAFT COPOLYMER WITH SAID MONOMER TO FORMSAID STABLE DISPERSION OF SOLID POLYMER IN ORGANIC LIQUID; THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE POLYMERISATION IN THE PRESENCE, IN THE SOLUTION, OF AN ALKYL MERCAPTAN IN WHICH THE ALKYL GROUPS CONTAIN 4 TO 9 CARBON ATOMS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |