US2879789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic control valves
Assignee: Individual
•
Filing: 1953-02-09
•
Granted: 1959-03-31
•
Expires: 1973-02-09
Abstract
No abstract record available.
Inventors
- 👤 Towler Frank Hathorn
- 👤 Frank H Towler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:34
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16; F; F15; F15B; F15B13/00; F15B13/01; F15B13/02; F15B13/04; F16; F16K; F16K17/00; F16K17/02; F16K17/164; F16K31/00; F16K31/12; F16K31/14; F16K31/143; F16K31/44; F16K31/52; F16K31/524; F16K31/52475; F16K31/52483; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7734; Y10T137/7781; Y10T137/7782; Y10T137/8593; Y10T137/86493; Y10T137/86558
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |