US3139679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming heat-exchange devices
Assignee: Individual
•
Filing: 1961-05-16
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Granted: 1964-07-07
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Expires: 1981-05-16
Abstract
No abstract record available.
Inventors
- 👤 Saj Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:57
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/0008; B23K1/0012; B21; B21D; B21D53/00; B21D53/02; B21D53/04; F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/126; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |