US2159391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polishing of spinnerettes
Assignee: North American Rayon Corp
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Filing: 1936-05-04
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Granted: 1939-05-23
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Expires: 1956-05-04
Abstract
No abstract record available.
Inventors
- 👤 Martin Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:34
CPC Classifications
D; D01; D01D; D01D4/00; D01D4/02; D01D4/022; B; B23; B23P; B23P25/00; B23Q; B23Q3/00; B23Q3/02; B23Q3/06; B23Q3/08; B24; B24B; B24B1/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812
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) | 1942-05-22 | 1942-11-21 | 1943-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-22 | 1946-11-21 | 1947-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-22 | 1950-11-21 | 1951-05-23 | $7700.00 | Window Closed / Lapsed |