US2941759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger construction
Assignee: General Dynamics Corp
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Filing: 1957-01-14
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Granted: 1960-06-21
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Expires: 1977-01-14
Abstract
No abstract record available.
Inventors
- 👤 Robert C Rice
- 👤 Edward W Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:02
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/02; B; B64; B64D; B64D13/00; B64D13/006; Y; Y10; Y10S; Y10S60/00; Y10S60/909; Y10S62/00; Y10S62/05; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24165; Y10T428/24273; Y10T428/24298; Y10T428/24306; Y10T428/24322; Y10T428/24331
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) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |