Patent US3749134A successfully refreshed from Google Patents.
US3225697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid pump for deep wells
Assignee: SWANTON WILLIAM F
•
Filing: 1962-03-01
•
Granted: 1965-12-28
•
Expires: 1982-03-01
Abstract
No abstract record available.
Inventors
- 👤 Kenard D Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:13
CPC Classifications
F; F04; F04B; F04B47/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A LIQUID PUMP FOR DEEP WELL OPERATION AND THE LIKE COMRPRISING AN ELONGATED BODY HAVING A CYLINDRICAL CHAMBER THEREIN, A PISTON IN SAID CHAMBER, AN INTAKE VALVE AT THE TOP OF SAID CHAMBER PROVIDING COMMUNICATION WITH THE CUTSIDE ABOVE SAID CHAMBER FOR ADMITTING LIQUID TO SAID CHAMBER ABOVE SAID PISTON, A DISCHARGE VALVE AT THE TOP OF SAID CHAMBER, POWER MEANS FOR LIFTING SAID PISTON, MEANS DEPENDENT UPON THE ACCUMULATION OF A PREDETER-
Claim 2
Dependent Claim
73 words
A LIQUID PUMP FOR DEEP WELL OPERATION AND THE LIKE COMRPRISING AN ELONGATED BODY HAVING A CYLINDRICAL CHAMBER THEREIN, A PISTON IN SAID CHAMBER, AN INTAKE VALVE AT THE TOP OF SAID CHAMBER PROVIDING COMMUNICATION WITH THE CUTSIDE ABOVE SAID CHAMBER FOR ADMITTING LIQUID TO SAID CHAMBER ABOVE SAID PISTON, A DISCHARGE VALVE AT THE TOP OF SAID CHAMBER, POWER MEANS FOR LIFTING SAID PISTON, MEANS DEPENDENT UPON THE ACCUMULATION OF A PREDETER-
References Cited (Backward Citations)
US244909A
Cited
US445962A
Cited
US911609A
Cited
US2237394A
Cited
US2336083A
Cited
US2432271A
Cited
US2577479A
Cited
US2690713A
Cited
US2704046A
Cited
US2913910A
Cited
US2953659A
Cited
US2934728A
Cited
US2956511A
Cited
US3065704A
Cited
US3046904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |