Patent US3458460A successfully refreshed from Google Patents.
US3458460A
Expired / Lapsed
US
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Unsaturated polyesters cross-linked by diels-alder reaction
Assignee: Hooker Chemical Corp
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Filing: 1967-11-27
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Granted: 1969-07-29
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Expires: 1987-11-27
Abstract
No abstract record available.
Inventors
- 👤 Alvin F Shepard
- 👤 William F Zimmer
- 👤 John T Ouderkirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:09
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/54; C08G63/553; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0478; C08G63/66; C08G63/668; C08G63/676
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) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |