US2709964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential accumulator for water systems
Assignee: Individual
•
Filing: 1952-10-14
•
Granted: 1955-06-07
•
Expires: 1972-10-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Francis E Brady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:33
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/3137
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-06 | 1958-12-06 | 1959-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-06 | 1962-12-06 | 1963-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-06 | 1966-12-06 | 1967-06-07 | $7700.00 | Window Closed / Lapsed |