US3387060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesters prepared from maleic anhydride and 2, 2, 4, 4-tetrachloro-1, 5-dihydroxy-3-pentanone
Assignee: Wyandotte Chemicals Corp
•
Filing: 1966-05-04
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Granted: 1968-06-04
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Expires: 1986-05-04
Abstract
No abstract record available.
Inventors
- 👤 Kokorudz Michael
- 👤 William K Langdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:39
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6828
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2335434A
Cited
US2779700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |