Patent US1765581A successfully refreshed from Google Patents.
US1765581A
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US
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Process in which cellulose acetate artificial silk and like products are treated with hot liquors
Assignee: Celanese Corp
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Filing: 1925-07-22
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Granted: 1930-06-24
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Expires: 1945-07-22
Abstract
No abstract record available.
Inventors
- 👤 Hall Archibald John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:03
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/225; A61C13/265; A61C13/2653; D; D06; D06M; D06M11/00; D06M11/07; D06M11/11; D06M11/13; D06M11/155; D06M11/17; D06M11/32; D06M11/36; D06M11/48; D06M11/51; D06M11/53; D06M11/55; D06M11/56; D06M11/57; D06M11/58; D06M11/64; D06M11/65; D06M11/67; D06M11/68; D06M11/70; D06M11/71
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) | 1933-06-23 | 1933-12-23 | 1934-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-06-23 | 1937-12-23 | 1938-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-06-23 | 1941-12-23 | 1942-06-24 | $7700.00 | Window Closed / Lapsed |