US2139616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device
Assignee: Detroit Lubricator Co
•
Filing: 1933-01-03
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Granted: 1938-12-06
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Expires: 1953-01-03
Abstract
No abstract record available.
Inventors
- 👤 Andrew K Foulds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:02
CPC Classifications
F; F23; F23D; F23D5/00; F23D5/12; F23D5/14; F23N; F23N2239/00; F23N2239/06; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7329; Y10T137/7358; Y10T137/7381; Y10T137/7387; Y10T137/7404
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) | 1941-12-05 | 1942-06-06 | 1942-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-12-05 | 1946-06-06 | 1946-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-12-05 | 1950-06-06 | 1950-12-06 | $7700.00 | Window Closed / Lapsed |