Patent US3989294A successfully refreshed from Google Patents.
US3100451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportioning pump
Assignee: Individual
•
Filing: 1961-01-24
•
Granted: 1963-08-13
•
Expires: 1981-01-24
Abstract
No abstract record available.
Inventors
- 👤 Alexander S Limpert
- 👤 Robin J Limpert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:40
CPC Classifications
B; B01; B01F; B01F35/00; B01F35/71; B01F35/714; F; F04; F04B; F04B43/00; F04B43/02; F04B43/06; B01F35/80; B01F35/88; B01F35/882; B01F35/8823; G; G05; G05D; G05D11/00; G05D11/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A FEEDER PUMP FOR HYDRAULIC PULSING, AN APERTURED CYLINDRICAL BODY OF RELATIVELY RIGID MATERIAL HAVING A HYDRAULIC PASSAGEWAY THERETHROUGH, FLEXIBLE DIAPHRAGMS COVERING THE ENDS OF SAID BODY AND HAVING OPENINGS ALIGNED WITH SAID PASSAGEWAY, RIGID COVER PLATES COVERING THE ENDS OF SAID BODY AND THE SAID DIAPHRAGMS AND HAVING RECESSED PORTIONS ON THE INTERIOR FACES THEREOF COMMUNICATING WITH SAID PASSAGEWAY AND HAVING AT LEAST ONE EXTERIOR OPENING FOR ENERGIZATION, THROUGH BOLTS PASSING BETWEEN SAID COVER PLATES AND THROUGH SAID BODY AND
Claim 2
Dependent Claim
82 words
IN A FEEDER PUMP FOR HYDRAULIC PULSING, AN APERTURED CYLINDRICAL BODY OF RELATIVELY RIGID MATERIAL HAVING A HYDRAULIC PASSAGEWAY THERETHROUGH, FLEXIBLE DIAPHRAGMS COVERING THE ENDS OF SAID BODY AND HAVING OPENINGS ALIGNED WITH SAID PASSAGEWAY, RIGID COVER PLATES COVERING THE ENDS OF SAID BODY AND THE SAID DIAPHRAGMS AND HAVING RECESSED PORTIONS ON THE INTERIOR FACES THEREOF COMMUNICATING WITH SAID PASSAGEWAY AND HAVING AT LEAST ONE EXTERIOR OPENING FOR ENERGIZATION, THROUGH BOLTS PASSING BETWEEN SAID COVER PLATES AND THROUGH SAID BODY AND
References Cited (Backward Citations)
US1835919A
Cited
GB339136A
Cited
FR856459A
Cited
US2399803A
Cited
US2768818A
Cited
US2919650A
Cited
US2869467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |