US1963974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of materials made of or containing cellulose esters or ethers
Assignee: Celanese Corp
•
Filing: 1929-06-27
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Granted: 1934-06-26
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Expires: 1949-06-27
Abstract
No abstract record available.
Inventors
- 👤 Ellis George Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:38
CPC Classifications
D; D06; D06P; D06P5/00; D06P5/02; D06P5/10; D06M; D06M11/00; D06M11/58; D06M11/67
Claims Analysis
Total Claims: 0
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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) | 1937-06-25 | 1937-12-25 | 1938-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-06-25 | 1941-12-25 | 1942-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-06-25 | 1945-12-25 | 1946-06-26 | $7700.00 | Window Closed / Lapsed |