US1607801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-circulating system
Assignee: Allis Chalmers Corp
•
Filing: 1920-12-20
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Granted: 1926-11-23
•
Expires: 1940-12-20
Abstract
No abstract record available.
Inventors
- 👤 Louis C Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:03
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/08; H01F27/10; H01F27/12; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391; Y10T137/2713; Y10T137/2842; Y10T137/2856; Y10T137/2863; Y10T137/6416; Y10T137/6579; Y10T137/8593; Y10T137/86187
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) | 1929-11-22 | 1930-05-24 | 1930-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-11-22 | 1934-05-24 | 1934-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-11-22 | 1938-05-24 | 1938-11-23 | $7700.00 | Window Closed / Lapsed |