Patent US2984645A successfully refreshed from Google Patents.
US2984645A
Expired / Lapsed
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Stabilized polyurethane compositions
Assignee: EIDP Inc
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Filing: 1958-10-20
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Granted: 1961-05-16
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Expires: 1978-10-20
Abstract
No abstract record available.
Inventors
- 👤 Guenther K Hoeschele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:24
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A POLYURETHANE COMPOSITION HAVING INCORPORATED THEREIN: (1) FROM ABOUT 0.1 TO 3.0% BY WEIGHT OF A 2,2''DIHYDROXYBENZOPHENONE SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
23 words
A POLYURETHANE COMPOSITION HAVING INCORPORATED THEREIN: (1) FROM ABOUT 0.1 TO 3.0% BY WEIGHT OF A 2,2''DIHYDROXYBENZOPHENONE SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |