Patent US4312901A successfully refreshed from Google Patents.
Patent US1978792A successfully refreshed from Google Patents.
US1978792A
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Aqueous treatment of artificial silk
Assignee: Celanese Corp
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Filing: 1929-12-24
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Granted: 1934-10-30
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Expires: 1949-12-24
Abstract
No abstract record available.
Inventors
- 👤 Hall Archibald John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:37
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/68; D06M11/70; D06M11/71; A; A61; A61C; A61C13/00; A61C13/225; A61C13/265; A61C13/2653; 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
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) | 1937-10-29 | 1938-04-30 | 1938-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-10-29 | 1942-04-30 | 1942-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-10-29 | 1946-04-30 | 1946-10-30 | $7700.00 | Window Closed / Lapsed |