Patent US5129390A successfully refreshed from Google Patents.
US3373221A
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Reaction products of unsaturated esters of polyepoxides and unsaturated carboxylic acids, and polyisocyanates
Assignee: Shell USA Inc
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Filing: 1964-11-04
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Granted: 1968-03-12
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Expires: 1984-11-04
Abstract
No abstract record available.
Inventors
- 👤 Clayton A May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:09
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/6705; C08G18/68; C08G18/683; C08G59/00; C08G59/14; C08G59/1494; C08G59/18; C08G59/40; C08G59/42; C08G59/4284; Y; Y10; Y10S; Y10S525/00; Y10S525/922
Claims Analysis
Total Claims: 0
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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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |