Patent US2769312A successfully refreshed from Google Patents.
US2769312A
Expired / Lapsed
US
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Refrigerant expansion control
Assignee: Motors Liquidation Co
•
Filing: 1953-12-04
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Granted: 1956-11-06
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Expires: 1973-12-04
Abstract
No abstract record available.
Inventors
- 👤 Marshall C Harrold
- 👤 Harold A Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:24
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/34; F25B41/355; F25B2341/00; F25B2341/06; F25B2341/068; F25B2341/0681; F25B2400/00; F25B2400/04; F25B2400/0411; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2675683A
Cited
US1969102A
Cited
US2118443A
Cited
US2128020A
Cited
US2133962A
Cited
US2169554A
Cited
US2720756A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |