US3395754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer devices and method of manufacture
Assignee: Individual
•
Filing: 1966-08-22
•
Granted: 1968-08-06
•
Expires: 1986-08-22
Abstract
No abstract record available.
Inventors
- 👤 Philip D French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:15
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; B; B21; B21D; B21D53/00; B21D53/02; B21D53/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3198990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |