Patent US2329378A successfully refreshed from Google Patents.
Patent US3770693A successfully refreshed from Google Patents.
US3770693A
Expired / Lapsed
US
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Stabilization of polyesterurethanes with 2-imino-oxazolidines
Assignee: Baychem Corp
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Filing: 1970-12-01
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Granted: 1973-11-06
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Expires: 1990-12-01
Abstract
Abstract THIS INVENTION RELATES TO THE USE OF 2-IMINO-OXAZOLIDINES, FOR THE STABILIZATION OF POLYESTER URETHANE COMPOSITIONS AGAINST HYDROLYSIS.
Inventors
- 👤 S Metzger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:10
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/08; C07D263/16; C07D263/28; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/35
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |