US3500952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical sensing device
Assignee: Pitney Bowes Inc
•
Filing: 1967-12-20
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Granted: 1970-03-17
•
Expires: 1987-12-20
Abstract
No abstract record available.
Inventors
- 👤 Basil B Beeken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:06
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/005; G; G01; G01V; G01V1/00; G01V1/001; G10; G10K; G10K5/00; G10K5/02; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/218; Y10T137/2191; Y10T137/2196
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2571640A
Cited
US2907337A
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US3234955A
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US3243993A
Cited
US3225988A
Cited
US3285608A
Cited
US3342284A
Cited
US3389679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |