US2961749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for brazing fins to tubes
Assignee: Brown Fintube Co
•
Filing: 1955-02-16
•
Granted: 1960-11-29
•
Expires: 1975-02-16
Abstract
No abstract record available.
Inventors
- 👤 Jr John W Brown
- 👤 Arvid C K Nihlen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:47
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/0008; B23K1/0012; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49384; Y10T29/4981; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/49872; Y10T29/49879
Claims Analysis
Total Claims: 0
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US2718864A
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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) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |