US1957979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for winding artificial silk for treatment
Assignee: CHEMICAL HOLDING Corp
•
Filing: 1931-03-21
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Granted: 1934-05-08
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Expires: 1951-03-21
Abstract
No abstract record available.
Inventors
- 👤 William F Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:50
CPC Classifications
D; D01; D01D; D01D7/00; B; B65; B65H; B65H54/00; B65H54/02; B65H54/28; D01D10/00; D01D10/04; D01D10/0418; B65H2701/00; B65H2701/30; B65H2701/31; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18992
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) | 1937-05-07 | 1937-11-06 | 1938-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-05-07 | 1941-11-06 | 1942-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-05-07 | 1945-11-06 | 1946-05-08 | $7700.00 | Window Closed / Lapsed |