Patent US2639559A successfully refreshed from Google Patents.
Patent US3575927A successfully refreshed from Google Patents.
US3575927A
Expired / Lapsed
US
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Brominated polyesters
Assignee: Eastman Kodak Co
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Filing: 1969-06-27
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Granted: 1971-04-20
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Expires: 1989-06-27
Abstract
Abstract POLYESTERS HAVING IMPROVED RESISTANCE TO BURNING PREPARED BY CONTACTING A SOLUTION OF THE POLYESTER WITH A BROMINATING AGENT IN THE PRESENCE OF A CHLORINATING AGENT, THE MOLAR RATIO OF BROMINE ATOMS TO CHLORINE ATOMS BEING GREATER THAN 1:1 WHEREBY THE POLYESTER IS HALOGENATED SUBSTANTIALLY UNIFORMLY THROUGHOUT.
Inventors
- 👤 Winston J Jackson Jr
- 👤 John R Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:31
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/42; C08G63/00; C08G63/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |