Patent US1168879A successfully refreshed from Google Patents.
US3211093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expendible gun assembly for perforating wells
Assignee: Mccullough Tool Co
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Filing: 1962-08-10
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Granted: 1965-10-12
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Expires: 1982-08-10
Abstract
No abstract record available.
Inventors
- 👤 Ira J Mccullough
- 👤 Otis J Mccullough
- 👤 William G Sweetman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:19
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/117
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
AN EXPENDIBLE PERFORATING GUN ASSEMBLY FOR USE IN WELLS, COMPRISING, A PLURALITY OF SELF-CONTAINED PERFORATING UNITS, EACH UNIT INCLUDING A HOLLOW CASING ADAPTED FOR CARRYING A SHAPED EXPLOSIVE CHARGE AND HAVING CLOSED OPPOSITE END PORTIONS, AND CARRIER MEANS FOR SUPPORTING SAID UNITS IN AN ELONGATE STRING WITH SAID END PORTIONS IN ABUTTING END-TO-END RELATION, SAID CARRIER MEANS INCLUDING COLLAR MEMBERS SEPARATE FROM AND SURROUNDING EACH PAIR OF ABUTTING END PORTIONS, A GENERALLY U-SHAPED FLEXIBLE WIRE SLING HAVING ITS BOTTOM PORTION DISPOSED IN SUPPORTING RELATION BENEATH THE LOWERMOST ONE OF SAID UNITS AND ITS ARM PORTIONS THREADED THROUGH THE BORES OF SAID COLLAR MEMBERS AND EXTENDING UPWARDLY ALONG OPPOSITE SIDES OF SAID UNITS, AND MEANS SECURING THE UPPER ENDS OF SAID ARM PORTIONS IN TENSION ABOUT SAID UNITS, SAID CASINGS AND SAID COLLAR MEMBERS BEING CONSTRUCTED OF GLASS.
Claim 2
Dependent Claim
137 words
AN EXPENDIBLE PERFORATING GUN ASSEMBLY FOR USE IN WELLS, COMPRISING, A PLURALITY OF SELF-CONTAINED PERFORATING UNITS, EACH UNIT INCLUDING A HOLLOW CASING ADAPTED FOR CARRYING A SHAPED EXPLOSIVE CHARGE AND HAVING CLOSED OPPOSITE END PORTIONS, AND CARRIER MEANS FOR SUPPORTING SAID UNITS IN AN ELONGATE STRING WITH SAID END PORTIONS IN ABUTTING END-TO-END RELATION, SAID CARRIER MEANS INCLUDING COLLAR MEMBERS SEPARATE FROM AND SURROUNDING EACH PAIR OF ABUTTING END PORTIONS, A GENERALLY U-SHAPED FLEXIBLE WIRE SLING HAVING ITS BOTTOM PORTION DISPOSED IN SUPPORTING RELATION BENEATH THE LOWERMOST ONE OF SAID UNITS AND ITS ARM PORTIONS THREADED THROUGH THE BORES OF SAID COLLAR MEMBERS AND EXTENDING UPWARDLY ALONG OPPOSITE SIDES OF SAID UNITS, AND MEANS SECURING THE UPPER ENDS OF SAID ARM PORTIONS IN TENSION ABOUT SAID UNITS, SAID CASINGS AND SAID COLLAR MEMBERS BEING CONSTRUCTED OF GLASS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |