Patent US3508828A successfully refreshed from Google Patents.
US1967871A
Expired / Lapsed
US
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Means and method of detecting leaks in refrigerating systems
Assignee: General Electric Co
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Filing: 1931-06-15
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Granted: 1934-07-24
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Expires: 1951-06-15
Abstract
No abstract record available.
Inventors
- 👤 Dantsixen Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:57
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; G; G01; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/20; G01M3/202; Y; Y10; Y10S; Y10S252/00; Y10S252/964
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) | 1937-07-23 | 1938-01-22 | 1938-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-07-23 | 1942-01-22 | 1942-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-07-23 | 1946-01-22 | 1946-07-24 | $7700.00 | Window Closed / Lapsed |