US3477550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic lock device
Assignee: Individual
•
Filing: 1968-05-03
•
Granted: 1969-11-11
•
Expires: 1988-05-03
Abstract
No abstract record available.
Inventors
- 👤 Kensei Suzuki
- 👤 Shigeo Tamura
- 👤 Yoshinori Kawachi
- 👤 Naohiro Nagafuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:27
CPC Classifications
B; B64; B64D; B64D11/00; B64D11/06; B64D11/0639; B64D11/064; B60; B60N; B60N2/00; B60N2/02; B60N2/22; B60N2/23; B60N2/231
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) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |