US3383040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger with thermosensitive control
Assignee: Individual
•
Filing: 1966-08-02
•
Granted: 1968-05-14
•
Expires: 1986-08-02
Abstract
No abstract record available.
Inventors
- 👤 William J Darm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:43
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/44; A47J31/54; F; F24; F24D; F24D1/00; F24D1/005; F24H; F24H9/00; F24H9/12; F24H9/13; F24H9/133
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1294376A
Cited
US3291965A
Cited
US1086663A
Cited
US1485897A
Cited
US2620892A
Cited
US3133590A
Cited
US3237684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |