Patent US2852640A successfully refreshed from Google Patents.
US2852640A
Expired / Lapsed
US
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Time delay device
Assignee: Controls Company of America
•
Filing: 1955-10-06
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Granted: 1958-09-16
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Expires: 1975-10-06
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Delancey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:01
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/30; H01H43/301; H01H43/302; H01H43/304; F; F23; F23N; F23N5/00; F23N5/02; F23N5/04; G; G05; G05B; G05B11/00
Claims Analysis
Total Claims: 0
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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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |