Patent US3208254A successfully refreshed from Google Patents.
US3208254A
Expired / Lapsed
US
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High pressure generating apparatus
Assignee: Individual
•
Filing: 1961-04-21
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Granted: 1965-09-28
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Expires: 1981-04-21
Abstract
No abstract record available.
Inventors
- 👤 Inoue Kiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:10
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/02; B21D26/06; B21D26/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
AN APPARATUS FOR DEFORMING A WORKPIECE BY THE APPLICATION THERETO OF FLUID PRESSURE, COMPRISING: HOUSING MEANS DEFINING WITH THE WORKPIECE A GENERALLY CLOSED CHAMBER SUBSTANTIALLY FILLED WITH DIELECTRIC LIQUID; A PAIR OF SPACED-APART CONDUCTORS JUXTAPOSED IN SAID CHAMBER AND IMMERSED IN SAID LIQUID WHILE DEFINING BETWEEN THEM A FIRST ELECTRICAL-DISCHARGE GAP EXTENDING GENERALLY PARALLEL TO THE WORKPIECE; MEANS FORMING A SECOND ELECTRICAL-DISCHARGE GAP IMMERSED IN SAID LIQUID ALONG A SIDE OF SAID FIRST GAP REMOTE FROM SAID WORKPIECE; A FUSIBLE MEMBER BRIDGING SAID CONDUCTORS AND SPANNING SAID FIRST GAP; AND
Claim 2
Independent Claim
90 words
AN APPARATUS FOR DEFORMING A WORKPIECE BY THE APPLICATION THERETO OF FLUID PRESSURE, COMPRISING: HOUSING MEANS DEFINING WITH THE WORKPIECE A GENERALLY CLOSED CHAMBER SUBSTANTIALLY FILLED WITH DIELECTRIC LIQUID; A PAIR OF SPACED-APART CONDUCTORS JUXTAPOSED IN SAID CHAMBER AND IMMERSED IN SAID LIQUID WHILE DEFINING BETWEEN THEM A FIRST ELECTRICAL-DISCHARGE GAP EXTENDING GENERALLY PARALLEL TO THE WORKPIECE; MEANS FORMING A SECOND ELECTRICAL-DISCHARGE GAP IMMERSED IN SAID LIQUID ALONG A SIDE OF SAID FIRST GAP REMOTE FROM SAID WORKPIECE; A FUSIBLE MEMBER BRIDGING SAID CONDUCTORS AND SPANNING SAID FIRST GAP; AND
References Cited (Backward Citations)
US528661A
Cited
US690856A
Cited
US1501023A
Cited
US2222762A
Cited
US2399466A
Cited
US2559227A
Cited
GB742460A
Cited
US3007133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |