US1789841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatically-controlled circulating system for oils or other liquids
Assignee: SF Bowser and Co Inc
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Filing: 1927-09-15
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Granted: 1931-01-20
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Expires: 1947-09-15
Abstract
No abstract record available.
Inventors
- 👤 Edwin W H Rennick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:04
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/10; Y; Y10; Y10S; Y10S29/00; Y10S29/05; Y10S29/055; Y10S29/088; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2703; Y10T137/8593; Y10T137/85954; Y10T137/85978; Y10T137/86131; Y10T408/00; Y10T408/44; Y10T82/00; Y10T82/30
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) | 1934-01-19 | 1934-07-21 | 1935-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-01-19 | 1938-07-21 | 1939-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-01-19 | 1942-07-21 | 1943-01-20 | $7700.00 | Window Closed / Lapsed |