US2783620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system
Assignee: Whirlpool Corp
•
Filing: 1954-04-19
•
Granted: 1957-03-05
•
Expires: 1974-04-19
Abstract
No abstract record available.
Inventors
- 👤 Jr William B Herndon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:18
CPC Classifications
F; F25; F25B; F25B47/00; F25B47/02; F25B47/022; F25D; F25D11/00; F25D11/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2292015A
Cited
US2510758A
Cited
US2689110A
Cited
US2657544A
Cited
US2665567A
Cited
US2687023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |