US3504147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerating device having improved switch
Assignee: Westinghouse Electric Corp
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Filing: 1968-01-22
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Granted: 1970-03-31
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Expires: 1988-01-22
Abstract
No abstract record available.
Inventors
- 👤 Karen E Christman
- 👤 Ralph E Christman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:15
CPC Classifications
H; H02; H02B; H02B1/00; H02B1/015; H02B1/04; H02B1/044; H02B1/048; F; F25; F25D; F25D23/00; F25D23/08; F25D23/082; F25D23/085; F25D29/00; F25D29/005; H01; H01H; H01H13/00; H01H13/02; H01H13/12; H01H13/14; H01H13/18; H01H13/183; F25D2700/00; F25D2700/02
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) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |