US2757907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Old Carco LLC
•
Filing: 1950-11-09
•
Granted: 1956-08-07
•
Expires: 1970-11-09
Abstract
No abstract record available.
Inventors
- 👤 Samuel B Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:38
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10S165/018
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB479840A
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US2229691A
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US2337956A
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FR957953A
Cited
US2432198A
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US2485088A
Cited
US2469758A
Cited
US2503651A
Cited
US2480248A
Cited
GB636839A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |