Patent US2650217A successfully refreshed from Google Patents.
Patent US2749537A successfully refreshed from Google Patents.
US2749537A
Expired / Lapsed
US
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Device for detecting motion in a confined space
Assignee: HOLMES ELECTRIC PROTECTIVE CO
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Filing: 1955-03-21
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Granted: 1956-06-05
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Expires: 1975-03-21
Abstract
No abstract record available.
Inventors
- 👤 Loudon Clifford Lee
- 👤 William E Riker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:01
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/16; G08B13/1609; G08B13/1618; G08B13/1627
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |