Patent US1755834A successfully refreshed from Google Patents.
US1755834A
Expired / Lapsed
US
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Smoke detector
Assignee: Individual
•
Filing: 1928-07-13
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Granted: 1930-04-22
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Expires: 1948-07-13
Abstract
No abstract record available.
Inventors
- 👤 George M Marr
- 👤 Marr Arthur Phelps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:12
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/26
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) | 1933-04-21 | 1933-10-21 | 1934-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-21 | 1937-10-21 | 1938-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-21 | 1941-10-21 | 1942-04-22 | $7700.00 | Window Closed / Lapsed |