US3715381A
Expired / Lapsed
US
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Polyisocyanate compositions stabilized against discoloration
Assignee: Honeywell International Inc
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Filing: 1969-06-11
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Granted: 1973-02-06
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Expires: 1989-06-11
Abstract
Abstract ORGANIC POLYISOCYANATE COMPOSITIONS ARE STABILIZED AGAINST DISCOLORATION BY HAVING INCORPORATED THEREIN FROM ABOUT 0.0001 TO 0.003 PERCENT BY WEIGHT OF 2,6-DI-TERTBUTYL-P-CRESOL AS STABILIZER THEREFOR.
Inventors
- 👤 R Spaunburgh
- 👤 J Hino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:28
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C07; C07C; C07C263/00; C07C263/18; C07C265/00; C07C265/14; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5075; C08G18/70; C08K; C08K5/00; C08K5/04; C08K5/13
Claims Analysis
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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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |