US3407874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fin tube assemblage for heat exchangers
Assignee: Individual
•
Filing: 1966-05-19
•
Granted: 1968-10-29
•
Expires: 1986-05-19
Abstract
No abstract record available.
Inventors
- 👤 Jr John R Gier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:54
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/08; F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/126; F28F1/24; F28F1/30; F28F2215/00; F28F2215/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1886498A
Cited
US2782009A
Cited
US2940162A
Cited
US3024003A
Cited
US3147800A
Cited
US3217798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |