Patent US931437A successfully refreshed from Google Patents.
US3255779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surge chamber
Assignee: Peters and Russell Inc
•
Filing: 1964-07-08
•
Granted: 1966-06-14
•
Expires: 1984-07-08
Abstract
No abstract record available.
Inventors
- 👤 Linus E Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:41
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/02; F04B11/00; F04B11/0008; F04B11/0016; F16; F16L; F16L55/00; F16L55/04; F16L55/045; F16L55/05; F16L55/052
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
FOR USE IN A PUMP, A DEVICE CONSTITUTIONG A SURGE CHAMBER INCLUDIONG A SHELL CLOSED AT ITS TOP AND OPEN AT ITS BOTTOM, AND A PLURALITY OF INTERSECTING BAFFLE PALTES IN THE INTERIOR OF SAID SHELL DEFINING A PLURALITY OF LONGITUDINALLY EXTENDING RECESSES OPENING AT THEIR LOWER ENDS THROUGH THE BOTTOM OF SAID SHELL, SAID PLATES MERGING WITH THE CLOSED TOP OF SAID SHELL INDIVIDUALLY TO CLOSE SAID RECESSES AT THEIR UPPER ENDS.
References Cited (Backward Citations)
DE354807C
Cited
US1809927A
Cited
US2290337A
Cited
US2497491A
Cited
US2630833A
Cited
US2962612A
Cited
US3035613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |