US2423781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus
Assignee: Individual
•
Filing: 1943-03-09
•
Granted: 1947-07-08
•
Expires: 1963-03-09
Abstract
No abstract record available.
Inventors
- 👤 Koontz Lamont Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:07
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/30; F24F11/70; F24F11/80; F24F2110/00; F24F2110/10; F24F2110/20
Claims Analysis
Total Claims: 0
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US2287237A
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US2253352A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-07 | 1951-01-06 | 1951-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-07 | 1955-01-06 | 1955-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-07 | 1959-01-06 | 1959-07-08 | $7700.00 | Window Closed / Lapsed |