Patent US2195374A successfully refreshed from Google Patents.
US2195374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal device
Assignee: US Filter Wallace and Tiernan Inc
•
Filing: 1936-10-06
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Granted: 1940-03-26
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Expires: 1956-10-06
Abstract
No abstract record available.
Inventors
- 👤 Charles F Wallace
- 👤 John R Mackay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:26
CPC Classifications
B; B61; B61L; B61L5/00; B61L5/12; B61L5/18; B61L5/1809; B61L5/1836; F; F21; F21V; F21V19/00; F21V19/04; G; G08; G08B; G08B5/00; G08B5/22; G08B5/36
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) | 1943-03-26 | 1943-09-25 | 1944-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-03-26 | 1947-09-25 | 1948-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-03-26 | 1951-09-25 | 1952-03-26 | $7700.00 | Window Closed / Lapsed |