Patent FR925131A successfully refreshed from Google Patents.
Patent US2842147A successfully refreshed from Google Patents.
US2842147A
Expired / Lapsed
US
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Force responsive devices
Assignee: Hagan Chemicals and Controls Inc
•
Filing: 1950-09-13
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Granted: 1958-07-08
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Expires: 1970-09-13
Abstract
No abstract record available.
Inventors
- 👤 Alfred A Markson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:22
CPC Classifications
G; G01; G01G; G01G7/00; G01G7/02; G01G7/04; G01R; G01R17/00; G01R17/02; G01R17/06; G01R17/08; H; H01; H01F; H01F7/00; H01F7/06; Y; Y10; Y10S; Y10S60/00; Y10S60/911; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |