US2812771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic testing equipment
Assignee: Individual
•
Filing: 1953-08-31
•
Granted: 1957-11-12
•
Expires: 1973-08-31
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Mcfarland
- 👤 Artie F Mcfarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:35
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/08; G01N3/10; G01N3/12; F; F04; F04B; F04B9/00; F04B9/08; F04B9/10; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1804; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2572
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1770297A
Cited
FR703569A
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US2135721A
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US2218565A
Cited
US2357029A
Cited
US2512025A
Cited
US2643612A
Cited
US2633739A
Cited
US2621675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |