US1768638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump for refrigerating apparatus
Assignee: Frigidaire Corp
•
Filing: 1929-04-30
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Granted: 1930-07-01
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Expires: 1949-04-30
Abstract
No abstract record available.
Inventors
- 👤 John H Sheats
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:06
CPC Classifications
F; F25; F25B; F25B31/00; F16; F16K; F16K15/00; F16K15/14; F16K15/1402; F16K15/148; F16K47/00; F16K47/01; F16K47/011; Y; Y10; Y10S; Y10S137/00; Y10S137/904; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7843; Y10T137/785; Y10T137/7879; Y10T137/7888; Y10T137/789
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) | 1933-06-30 | 1933-12-30 | 1934-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-06-30 | 1937-12-30 | 1938-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-06-30 | 1941-12-30 | 1942-07-01 | $7700.00 | Window Closed / Lapsed |