Patent US2719404A successfully refreshed from Google Patents.
US2719404A
Expired / Lapsed
US
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Hydraulic safety unit
Assignee: Individual
•
Filing: 1952-08-30
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Granted: 1955-10-04
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Expires: 1972-08-30
Abstract
No abstract record available.
Inventors
- 👤 Clifford D Hobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:31
CPC Classifications
B; B60; B60T; B60T11/00; B60T11/10; B60T11/28; B60T11/32; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7726; Y10T137/7727
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2077646A
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US2515956A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |