US2877835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus
Assignee: —
•
Filing: —
•
Granted: 1959-03-17
•
Expires: 1976-03-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:46
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/24; F23N5/242; F23D; F23D14/00; F23D14/46; F23D14/72; F23N5/02; F23N5/20; F23N5/203; F23N2223/00; F23N2227/00; F23N2227/02; F23N2227/28; F23N2229/00; Y; Y10; Y10T; Y10T74/00; Y10T74/11; Y10T74/114
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2212255A
Cited
US2185317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |