Patent US2065664A successfully refreshed from Google Patents.
US2065664A
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US
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Manufacture of articles from cellulose esters or ethers
Assignee: Celanese Corp
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Filing: 1931-03-19
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Granted: 1936-12-29
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Expires: 1951-03-19
Abstract
No abstract record available.
Inventors
- 👤 Dickie William Alexander
- 👤 Sowter Percy Frederick Combe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:17
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/24; D01F2/28; D01F2/30
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) | 1939-12-29 | 1940-06-29 | 1940-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-12-29 | 1944-06-29 | 1944-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-12-29 | 1948-06-29 | 1948-12-29 | $7700.00 | Window Closed / Lapsed |