Patent US2487469A successfully refreshed from Google Patents.
US2487469A
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US
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Counter-actuating mechanism
Assignee: PRODUCTION INSTR Co
•
Filing: 1943-02-23
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Granted: 1949-11-08
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Expires: 1963-02-23
Abstract
No abstract record available.
Inventors
- 👤 Martin L Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:19
CPC Classifications
G; G06; G06M; G06M1/00; G06M1/28; G06M1/34; G06M1/343; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2133; Y10T74/2136; Y10T74/2137
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US961358A
Cited
US1370540A
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US1459730A
Cited
GB325296A
Cited
US2089936A
Cited
US2025978A
Cited
US2165733A
Cited
US2239310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |