US2995807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchangers and methods of making the same
Assignee: Revere Copper and Brass Inc
•
Filing: 1957-11-29
•
Granted: 1961-08-15
•
Expires: 1977-11-29
Abstract
No abstract record available.
Inventors
- 👤 Leland E Gibbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:25
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; B21D53/045; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49369; Y10T29/49371
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2289685A
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US2595472A
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US2626130A
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US2690002A
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US2740188A
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US2712736A
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US2766514A
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US2779086A
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US2766019A
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US2856162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |