US2745028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Qualitrol Co LLC
•
Filing: 1952-11-15
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Granted: 1956-05-08
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Expires: 1972-11-15
Abstract
No abstract record available.
Inventors
- 👤 George E Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:19
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/32; G01F23/34; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49679; Y10T29/49826; Y10T29/4984; Y10T29/49845; Y10T29/49853; Y10T29/49945
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US359030A
Cited
US751902A
Cited
US1174787A
Cited
GB220852A
Cited
US1987415A
Cited
US2530934A
Cited
US2514323A
Cited
US2566743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |