Patent US3535287A successfully refreshed from Google Patents.
US3535287A
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Polyurethanes based on three-component polyester oligomers
Assignee: Union Carbide Corp
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Filing: 1968-06-19
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Granted: 1970-10-20
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Expires: 1988-06-19
Abstract
No abstract record available.
Inventors
- 👤 John Wynstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:21
CPC Classifications
C; C09; C09D; C09D169/00; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; C08G18/4219; C08G18/4266; C08G18/4286; C08G18/44; C08G18/67; C08G18/68; C08G18/683; C08G18/686; C08G64/00; C08G64/02; C08G64/0208; C08G64/0216; C08L; C08L67/00; C08L69/00; C09D167/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2970118A
Cited
US2981700A
Cited
US3015650A
Cited
US3079350A
Cited
US2982754A
Cited
US3055869A
Cited
US3094510A
Cited
US3141900A
Cited
US3248373A
Cited
US3373143A
Cited
BE635304A
Cited
US3158638A
Cited
US3288730A
Cited
US3322812A
Cited
US3352830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |