US2961851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1958-03-12
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Granted: 1960-11-29
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Expires: 1978-03-12
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Ehrenfreund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:34
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/10; F25D23/003; F25D23/06; F25D23/061; F25D2323/00; F25D2323/002; F25D2323/0026; F25D2323/00264; F25D2323/0027; F25D2323/00272; F25D2400/00; F25D2400/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |