Patent US2818748A successfully refreshed from Google Patents.
US2818748A
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US
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Tamper proof actuator
Assignee: Melpar Inc
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Filing: 1952-09-04
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Granted: 1958-01-07
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Expires: 1972-09-04
Abstract
No abstract record available.
Inventors
- 👤 Lawson Axel Arnold
- 👤 Chester W Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:27
CPC Classifications
G; G05; G05G; G05G7/00; G05G7/02; G05G2700/00; G05G2700/12; G05G2700/16; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20732; Y10T74/20762
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |