US3156236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical injector
Assignee: Cordis Corp
•
Filing: 1961-12-07
•
Granted: 1964-11-10
•
Expires: 1981-12-07
Abstract
No abstract record available.
Inventors
- 👤 Donald E Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:10
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/142; A61M5/145; A61M5/1452; A61M2230/00; A61M2230/04; A61M2230/06; A61M5/168; A61M5/16831; A61M5/16854; Y; Y10; Y10S; Y10S128/00; Y10S128/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
AN INJECTION DEVICE FOR PROVIDING CONSTANT HYDRAULIC PRESSURE SUITABLE FOR ANGIOGRAPHY INJECTIONS COMPRISING: A CONSTANT TORQUE ELECTRIC MOTOR; MEANS FOR EFFICIENTLY CONVERTING THE CONSTANT TORQUE AVAILABLE FROM SAID MOTOR TO CONSTANT THRUST; AND A HYDRAULIC PISTON AND CYLINDER, THE PISTON OF WHICH IS DRIVEN BY SAID MEANS WHEREBY ENERGIZATION OF SAID MOTOR TO PRODUCE CONSTANT TORQUE WILL PROVIDE CONSTANT PRESSURE IN A HYDRAULIC MEDIUM CONTAINED IN SAID CYLINDER.
Claim 2
Dependent Claim
68 words
AN INJECTION DEVICE FOR PROVIDING CONSTANT HYDRAULIC PRESSURE SUITABLE FOR ANGIOGRAPHY INJECTIONS COMPRISING: A CONSTANT TORQUE ELECTRIC MOTOR; MEANS FOR EFFICIENTLY CONVERTING THE CONSTANT TORQUE AVAILABLE FROM SAID MOTOR TO CONSTANT THRUST; AND A HYDRAULIC PISTON AND CYLINDER, THE PISTON OF WHICH IS DRIVEN BY SAID MEANS WHEREBY ENERGIZATION OF SAID MOTOR TO PRODUCE CONSTANT TORQUE WILL PROVIDE CONSTANT PRESSURE IN A HYDRAULIC MEDIUM CONTAINED IN SAID CYLINDER.
References Cited (Backward Citations)
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Cited
GB191328796A
Cited
FR745957A
Cited
US2627270A
Cited
US2466772A
Cited
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |