US2310415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for controlling digesters
Assignee: Schneider Electric Systems USA Inc
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Filing: 1938-12-01
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Granted: 1943-02-09
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Expires: 1958-12-01
Abstract
No abstract record available.
Inventors
- 👤 Webster W Frymoyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:57
CPC Classifications
D; D21; D21C; D21C7/00; D21C7/12; G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/2066; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/2452; Y10T137/7722; Y10T137/7737
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) | 1946-02-08 | 1946-08-10 | 1947-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-02-08 | 1950-08-10 | 1951-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-02-08 | 1954-08-10 | 1955-02-09 | $7700.00 | Window Closed / Lapsed |