US3534357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Customer identifying signal system
Assignee: Individual
•
Filing: 1966-09-22
•
Granted: 1970-10-13
•
Expires: 1986-09-22
Abstract
No abstract record available.
Inventors
- 👤 John E Purney Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:32
CPC Classifications
A; A47; A47F; A47F10/00; A47F10/02; A61; A61B; A61B8/00; A61B8/06; G; G01; G01S; G01S15/00; G01S15/88; G01S15/89; G01S15/8906; G01S15/8979
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |