Patent US1884612A successfully refreshed from Google Patents.
US1879631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torch
Assignee: Union Carbide and Carbon Research Laboratories Inc
•
Filing: 1929-11-12
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Granted: 1932-09-27
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Expires: 1949-11-12
Abstract
No abstract record available.
Inventors
- 👤 Mott Chester
- 👤 Gerald G Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:46
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/38; F23D14/46; F23D14/465; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928; Y10T137/87016; Y10T137/87024
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) | 1935-09-27 | 1936-03-28 | 1936-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-09-27 | 1940-03-28 | 1940-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-09-27 | 1944-03-28 | 1944-09-27 | $7700.00 | Window Closed / Lapsed |