Patent US3098148A successfully refreshed from Google Patents.
US3098148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for producing perforations of very small cross-section
Assignee: Compagnie de Saint Gobain SA
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Filing: 1960-03-04
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Granted: 1963-07-16
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Expires: 1980-03-04
Abstract
No abstract record available.
Inventors
- 👤 Piot Paul
- 👤 Barassin Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:03
CPC Classifications
B; B23; B23H; B23H9/00; B23H9/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
AN APPARATUS FOR PRODUCING PERFORATIONS OF MINUTE AND UNIFORM DIAMETER IN A METALLIC WORKPIECE, WHICH COMPRISES A TANK ADAPTED TO CONTAIN A DIELECTRIC LIQUID, MEANS FOR SUPPORTING SAID WORKPIECE WITHIN SAID TANK, A SUPPORT FOR A PLURALITY OF CYLINDRICAL WIRE ELECTRODES OF MINUTE AND UNIFORM DIAMETER, A SPARK DISCHARGE CIRCUIT HAVING THE OPPOSITE TERMINALS THEREOF CONNECTED TO SAID SUPPORT AND TO SAID WORKPIECE, MEANS FOR ADVANCING SAID SUPPORT TOWARD SAID WORKPIECE TO GENERATE SPARK DISCHARGES BETWEEN THE ENDS OF SAID WIRE ELECTRODES AND SAID WORKPIECE TO DISINTEGRATED THE METAL OF THE WORKPIECE AT THE POINTS OF SAID DISCHAFGES, GUIDE MEANS OF INSULTATING MATERIAL PROVIDED WITH APERTURES AT DISPLACEMENTS CORRESPONDING TO THE SPACING BETWEEN SAID WIRE ELECTRODES FOR GUIDING THE ENDS OF SAID WIRE ELECTRODES IN THEIR TRAVEL TOWARDS SAID WORKPIECE, AND MEANS FOR ARRESTING SAID SUPPORT BEFORE THE WIRE ELECTRODES PENETRATE THE WORKPIECE COMPLETERLY.
Claim 2
Independent Claim
144 words
AN APPARATUS FOR PRODUCING PERFORATIONS OF MINUTE AND UNIFORM DIAMETER IN A METALLIC WORKPIECE, WHICH COMPRISES A TANK ADAPTED TO CONTAIN A DIELECTRIC LIQUID, MEANS FOR SUPPORTING SAID WORKPIECE WITHIN SAID TANK, A SUPPORT FOR A PLURALITY OF CYLINDRICAL WIRE ELECTRODES OF MINUTE AND UNIFORM DIAMETER, A SPARK DISCHARGE CIRCUIT HAVING THE OPPOSITE TERMINALS THEREOF CONNECTED TO SAID SUPPORT AND TO SAID WORKPIECE, MEANS FOR ADVANCING SAID SUPPORT TOWARD SAID WORKPIECE TO GENERATE SPARK DISCHARGES BETWEEN THE ENDS OF SAID WIRE ELECTRODES AND SAID WORKPIECE TO DISINTEGRATED THE METAL OF THE WORKPIECE AT THE POINTS OF SAID DISCHAFGES, GUIDE MEANS OF INSULTATING MATERIAL PROVIDED WITH APERTURES AT DISPLACEMENTS CORRESPONDING TO THE SPACING BETWEEN SAID WIRE ELECTRODES FOR GUIDING THE ENDS OF SAID WIRE ELECTRODES IN THEIR TRAVEL TOWARDS SAID WORKPIECE, AND MEANS FOR ARRESTING SAID SUPPORT BEFORE THE WIRE ELECTRODES PENETRATE THE WORKPIECE COMPLETERLY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-15 | 1967-01-14 | 1967-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-15 | 1971-01-14 | 1971-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-15 | 1975-01-14 | 1975-07-16 | $7700.00 | Window Closed / Lapsed |