Patent US3649599A successfully refreshed from Google Patents.
US3649599A
Expired / Lapsed
US
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Epoxy-modified amine curable urethane resin and method of making same
Assignee: Honeywell Inc
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Filing: 1970-02-20
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Granted: 1972-03-14
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Expires: 1990-02-20
Abstract
Abstract AN ADDUCT PREPARED BY REACTING A MONOEPOXIDE AND AN AROMATIC DIPRIAMRY AMINE IN A MOL RATIO OF NO MORE THAN ABOUT 1 MOL OF THE FORMER PER MOL OF THE LATTER, IS MIXED WITH AN ISOCYANATE-CONTAINING URETHANE PREPOLYMER (INCLUDING A URETHANE POLYMER-FORMING MIXTURE OF POLYSIOCYANATE AND POLYOL).
Inventors
- 👤 Frank D Swanson
- 👤 Norm Gregornik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:25
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S528/00; Y10S528/905
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |