US2456869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic pulsator system
Assignee: Individual
•
Filing: 1944-04-12
•
Granted: 1948-12-21
•
Expires: 1964-04-12
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:25
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR547062A
Cited
US1806009A
Cited
CH135912A
Cited
US1881266A
Cited
US2093604A
Cited
US2041916A
Cited
US2377170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-21 | 1952-06-21 | 1952-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-21 | 1956-06-21 | 1956-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-21 | 1960-06-21 | 1960-12-21 | $7700.00 | Window Closed / Lapsed |