US2560441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic pumping system
Assignee: Individual
•
Filing: 1944-10-02
•
Granted: 1951-07-10
•
Expires: 1964-10-02
Abstract
No abstract record available.
Inventors
- 👤 James W F Holl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:04
CPC Classifications
F; F04; F04B; F04B47/00; Y; Y10; Y10S; Y10S417/00; Y10S417/904
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US717136A
Cited
US846266A
Cited
DE554062C
Cited
US2065219A
Cited
US2157219A
Cited
US2139101A
Cited
US2159467A
Cited
US2318852A
Cited
US2390124A
Cited
US2258103A
Cited
US2367248A
Cited
US2325138A
Cited
US2347301A
Cited
US2299692A
Cited
US2363142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |