US2087981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of artificial threads and other products from cellulose
Assignee: Individual
•
Filing: 1930-06-27
•
Granted: 1937-07-27
•
Expires: 1950-06-27
Abstract
No abstract record available.
Inventors
- 👤 Lilienfeld Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:41
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/207; D06M13/21; C; C08; C08B; C08B13/00; C08B13/02; D01; D01F; D01F2/00; D01F2/24; D01F2/28; D06M11/00; D06M11/51; D06M11/53
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) | 1940-07-26 | 1941-01-25 | 1941-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-07-26 | 1945-01-25 | 1945-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-07-26 | 1949-01-25 | 1949-07-27 | $7700.00 | Window Closed / Lapsed |