US3539084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensing device
Assignee: Synergistics Inc
•
Filing: 1968-11-25
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Granted: 1970-11-10
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Expires: 1988-11-25
Abstract
No abstract record available.
Inventors
- 👤 John A Bradshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:42
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/05; G11B15/06; G03; G03B; G03B1/00; G03B1/42; G03B1/54; G03B21/00; G03B21/14; G03B21/32; G03B21/43; G03B21/50
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) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |