US2891983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized organic isocyanates
Assignee: GAF Chemicals Corp
•
Filing: 1956-04-05
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Granted: 1959-06-23
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Expires: 1976-04-05
Abstract
No abstract record available.
Inventors
- 👤 Bloom Albert
- 👤 Harlan B Freyermuth
- 👤 James B Normington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:39
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/14; C07C263/00; C07C263/18; C07C265/10; C07C265/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
THE METHOD OF RETARDING THE POLYMERIZATION OF AN ORGANIC ISOCYANATE SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC AND AROMATIC ISOCYANATES WHICH COMPRISES ADDING THERETO FROM 0.01 TO 1.0% BY WEIGHT OF PHOSGENE.
References Cited (Backward Citations)
US2437867A
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US2476779A
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US2480089A
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US2620349A
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US2683144A
Cited
US2683160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-22 | 1962-12-22 | 1963-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-22 | 1966-12-22 | 1967-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-22 | 1970-12-22 | 1971-06-23 | $7700.00 | Window Closed / Lapsed |