US3524707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsating light source smoke detector
Assignee: JULIAN E HANSEN JR
•
Filing: 1967-08-14
•
Granted: 1970-08-18
•
Expires: 1987-08-14
Abstract
No abstract record available.
Inventors
- 👤 Julian E Hansen Sr
- 👤 Julian E Hansen Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:32
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/49; G01N21/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1746525A
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US1828894A
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US2076553A
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US2877453A
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US2962926A
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US3078756A
Cited
US3013466A
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US3045123A
Cited
US3127464A
Cited
US3317736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |