Patent US1989099A successfully refreshed from Google Patents.
US1989099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of improving artificial threads
Assignee: Individual
•
Filing: 1929-05-29
•
Granted: 1935-01-29
•
Expires: 1949-05-29
Abstract
No abstract record available.
Inventors
- 👤 Lilienfeld Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:47
CPC Classifications
F; F02; F02M; F02M21/00; D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D06; D06M; D06M11/00; D06M11/07; D06M11/11; D06M11/22; D06M11/32; D06M11/36; D06M11/38; D06M11/40; D06M11/51; D06M11/53; D06M11/55; D06M11/58; D06M11/64; D06M11/73; D06M11/75; F02M59/00; F02M59/20; F02M59/24; F02M59/26; D06M2101/00; D06M2101/02; D06M2101/04; D06M2101/06; D06M2101/08; F02M2700/00; F02M2700/13; F02M2700/1317; F02M2700/1388
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1938-01-28 | 1938-07-30 | 1939-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-01-28 | 1942-07-30 | 1943-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-01-28 | 1946-07-30 | 1947-01-29 | $7700.00 | Window Closed / Lapsed |