Patent US3087918A successfully refreshed from Google Patents.
US3087918A
Expired / Lapsed
US
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Modified acrolein-pentaerythritol resins
Assignee: Union Carbide Corp
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Filing: 1957-08-01
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Granted: 1963-04-30
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Expires: 1977-08-01
Abstract
No abstract record available.
Inventors
- 👤 Howard R Guest
- 👤 Ben W Kiff
- 👤 Calvert B Halstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:59
CPC Classifications
C; C08; C08G; C08G4/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
13 words
A SOLID POLYMER OF PENTAERYTHRITOL AND AN UNSATURATED ACETAL HAVIN THE GENERAL FORMULA:
References Cited (Backward Citations)
US2292611A
Cited
US2401776A
Cited
DE838827C
Cited
US2687407A
Cited
FR1108885A
Cited
US2913434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |