US3054778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetic anhydride modified polyurethane
Assignee: Dow Chemical Co
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Filing: 1959-10-19
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Granted: 1962-09-18
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Expires: 1979-10-19
Abstract
No abstract record available.
Inventors
- 👤 Charles R Honea
- 👤 Elmer L Pendleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:00
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PROCESS FOR MAKING A WATER-SOLUBLE, ORIENTABLE, FIBER- AND FILM-FORMING RESIN COMPRISING REACTING A POLYOXYALKYLENE GLYCOL OF MOLECULAR WEIGHT AT LEAST ABOUT 4000 AND CONSISTING PREDOMINANTLY OF OXYETHYLENE RADICALS WITH ABOUT 0.8 TO 3 MOLAR EQUIVALENTS OF AN ORGANIC DIISOCYANATE AND REACTING THE THUS FORMED INTERMEDIATE RESIN WITH ABOUT 1 TO 2 MOLAR PROPORTIONS, BASED ON THE DIISOCYANATE, OF ACETIC ANHYDRIDE.
Claim 2
Dependent Claim
61 words
A PROCESS FOR MAKING A WATER-SOLUBLE, ORIENTABLE, FIBER- AND FILM-FORMING RESIN COMPRISING REACTING A POLYOXYALKYLENE GLYCOL OF MOLECULAR WEIGHT AT LEAST ABOUT 4000 AND CONSISTING PREDOMINANTLY OF OXYETHYLENE RADICALS WITH ABOUT 0.8 TO 3 MOLAR EQUIVALENTS OF AN ORGANIC DIISOCYANATE AND REACTING THE THUS FORMED INTERMEDIATE RESIN WITH ABOUT 1 TO 2 MOLAR PROPORTIONS, BASED ON THE DIISOCYANATE, OF ACETIC ANHYDRIDE.
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) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |