US3197975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system and heat exchangers
Assignee: Dunham Bush Inc
•
Filing: 1962-08-24
•
Granted: 1965-08-03
•
Expires: 1982-08-24
Abstract
No abstract record available.
Inventors
- 👤 Boling Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:50
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/06; F24; F24F; F24F5/00; F24F5/0007; F24F5/001; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053; F28D1/05316; F28D7/00; F28D7/10; F28D7/106; F28F1/00; F28F1/10; F28F1/12; F28F1/14; F28F1/22; F28F1/34; F28F1/36; F28F1/40; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49359; Y10T29/49361; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2055499A
Cited
US2059992A
Cited
CH225906A
Cited
US2611585A
Cited
US2611587A
Cited
US2658358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |