US3412787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Individual
•
Filing: 1967-08-08
•
Granted: 1968-11-26
•
Expires: 1987-08-08
Abstract
No abstract record available.
Inventors
- 👤 John D Muligan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:51
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/04; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/471; Y10S165/486; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1613010A
Cited
US1709176A
Cited
US1748121A
Cited
US1849396A
Cited
US2136086A
Cited
US2164005A
Cited
US2195259A
Cited
US2657018A
Cited
US2819731A
Cited
US2875986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |