Patent US3781554A successfully refreshed from Google Patents.
Patent US3031845A successfully refreshed from Google Patents.
US3031845A
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Hydraulic system
Assignee: Ling Temco Vought Inc
•
Filing: 1959-10-09
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Granted: 1962-05-01
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Expires: 1979-10-09
Abstract
No abstract record available.
Inventors
- 👤 John W Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:36
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/04; F15B21/044; F15B1/00; F15B1/02; F15B1/04; F15B1/08; F15B1/26; F15B15/00; F15B15/19; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/30; F15B2201/315; F15B2201/3151; F15B2201/3153; F15B2201/32; F15B2201/40; F15B2201/41; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/309
Claims Analysis
Total Claims: 0
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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) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |