Patent US765507A successfully refreshed from Google Patents.
US3234875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet perforating apparatus
Assignee: Individual
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Filing: 1964-01-09
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Granted: 1966-02-15
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Expires: 1984-01-09
Abstract
No abstract record available.
Inventors
- 👤 Eugene O Tolson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:04
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/117
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A JET FORMING EXPLOSIVE PERFORATING UNIT HAVING A DETONATING END AND A JET DISCHARGE END AND COMPRISING A HEAVY DUCTILE METAL BACKING MEMBER PROVIDED WITH A PLURALITY OF CYLINDRICAL SECTIONS SPACED AXIALLY FROM EACH OTHER AND HAVING DECREASIONG DIAMETERS IN A DIRECTION EXTENDING FROM THE JET DISCHARGE END OF SAID PERFORATING UNIT TO THE DETONATING END OF SAID PERFORATING UNIT, SAID BACKING MEMBER ALSO BEING PROVIDED WITH FRUSTO-CONICAL SECTIONS INTERCONNECTING THE ADJACENT ENDS OF THE CYLINDRICAL SECTIONS OF SAID MEMBER AND HAVING A STEPPED AND PROGRESSIVELY GREATER WALL THICKNESS FROM END TO END IN A DIRECTION EXTENDING FROM THE JET DISCHARGE END OF SAID PERFORATING UNIT TO THE DETONATING END OF SAID PERFORATING
Claim 2
Dependent Claim
113 words
A JET FORMING EXPLOSIVE PERFORATING UNIT HAVING A DETONATING END AND A JET DISCHARGE END AND COMPRISING A HEAVY DUCTILE METAL BACKING MEMBER PROVIDED WITH A PLURALITY OF CYLINDRICAL SECTIONS SPACED AXIALLY FROM EACH OTHER AND HAVING DECREASIONG DIAMETERS IN A DIRECTION EXTENDING FROM THE JET DISCHARGE END OF SAID PERFORATING UNIT TO THE DETONATING END OF SAID PERFORATING UNIT, SAID BACKING MEMBER ALSO BEING PROVIDED WITH FRUSTO-CONICAL SECTIONS INTERCONNECTING THE ADJACENT ENDS OF THE CYLINDRICAL SECTIONS OF SAID MEMBER AND HAVING A STEPPED AND PROGRESSIVELY GREATER WALL THICKNESS FROM END TO END IN A DIRECTION EXTENDING FROM THE JET DISCHARGE END OF SAID PERFORATING UNIT TO THE DETONATING END OF SAID PERFORATING
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |