US3477989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyesters of 2,5-dihydroxyterephthalic acid
Assignee: Sandoz AG
•
Filing: 1965-06-30
•
Granted: 1969-11-11
•
Expires: 1985-06-30
Abstract
No abstract record available.
Inventors
- 👤 Hermann Zorn
- 👤 Josef Hrach
- 👤 Winfried Zeschmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:53
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/02; C08G63/60; C08G63/668; C08G63/672; C08G63/78; C08G63/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3047536A
Cited
US3227680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |