US3401715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tamper-proof lock for valves
Assignee: SMITH VALVE CORP
•
Filing: 1967-08-03
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Granted: 1968-09-17
•
Expires: 1987-08-03
Abstract
No abstract record available.
Inventors
- 👤 Francis E Johnson
- 👤 Lorusso Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:41
CPC Classifications
F; F16; F16K; F16K35/00; F16K35/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7069; Y10T137/7256
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US939108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |