US2645631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsion copolymerization of sulfur dioxide and unsaturated organic compounds
Assignee: Phillips Petroleum Co
•
Filing: 1948-02-16
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Granted: 1953-07-14
•
Expires: 1968-02-16
Abstract
No abstract record available.
Inventors
- 👤 Willie W Crouch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:25
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/20; C08G75/205; C08G75/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
IN THE PRODUCTION OF A SOLID HETEROPOLYMERIC RESIN RESULTING FROM INTERREACTION OF SULFUR DIOXIDE AND MONOOLEFINIC ORGANIC MATERIAL CONTAINING NOT MORE THAN TWENTY CARBON ATOMS PER MOLECULE EMPLOYING A CATALYTIC AGENT, AND EMPLOYING AT LEAST ONE MOLECULAR EQUIVALENT OF SULFUR DIOXIDE AND FIVE MOLECULAR EQUIVALENTS OF SAID ORGANIC MATERIAL, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID REACTION WITH SAID REACTANTS BEING DISPERSED IN AN AQUEOUS EMULSION AND RECOVERING SAID RESIN FROM THE EMULSION.
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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) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |