US2945680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Old Carco LLC
•
Filing: 1955-04-28
•
Granted: 1960-07-19
•
Expires: 1975-04-28
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Slemmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:02
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0025; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/399; Y10S165/909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1636958A
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US2019351A
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US2081678A
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US2321110A
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US2288061A
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US2613920A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |