US3485606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the regulation of gas heating systems
Assignee: Compagnie Francaise de Raffinage SA
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Filing: 1965-03-01
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Granted: 1969-12-23
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Expires: 1985-03-01
Abstract
No abstract record available.
Inventors
- 👤 Jean Joseph Pierre Olivier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:34
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D1/76; F; F23; F23N; F23N1/00; F23N5/00; F23N5/02; F23N5/027; F23N2221/00; F23N2221/10; F23N2233/00; F23N2233/06; F23N2235/00; F23N2235/12; F23N2235/20; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/0346
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2349521A
Cited
US3273982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |