US3580873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonyellowing polyurethane
Assignee: Uniroyal Chemical Co Inc
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Filing: 1967-10-18
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Granted: 1971-05-25
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Expires: 1987-10-18
Abstract
Abstract A NONYELLOWING POLYURETHANE PREPARED BY REACTING AN ISOCYANATO-TERMINATED PREPOLYMER WITH A MIXTURE OF MONOETHANOLAMINE AND TRIETHANOLAMINE IN THE PRESENCE OF A CATALYST AMOUNT OF A METAL DRIER COMPOUND SUCH AS CALCIUM, ZINC- OR LEAD NAPHTHENATE OR OCTATE.
Inventors
- 👤 Dominick Bianca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:44
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/26; C08G18/10; C08G18/222; C08G18/225
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |