Patent US3282354A successfully refreshed from Google Patents.
US3282354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective shaped charge
Assignee: Harrison Jet Guns Ltd
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Filing: 1962-04-26
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Granted: 1966-11-01
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Expires: 1982-04-26
Abstract
No abstract record available.
Inventors
- 👤 John R Hakala
- 👤 James R Holden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:50
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/116; E21B43/117; F; F42; F42B; F42B1/00; F42B1/02; F42B1/032
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A WELL PERFORATING APPARATUS WHICH COMPRISES: (A) A PRESSURE-RESISTANT HOLLOW BODY HAVING A CENTRAL BORE WITH A LATERAL PORT EXTENDING FROM SAID BORE; (B) A SHAPED CHARGE STRUCTURE HAVING AN INNER CASE WITH AN OPEN MOUTH AND A LINER CONFINING A QUANTITY OF AN EXPLOSIVE THEREBETWEEN; (C) AN OUTER CASE ENCOMPSSING AND SUPPORTING SAID INNER CASE AT ITS MOUTH AND APEX BUT MAINTAINED IN SUBSTANTIAL SPACED RELATION FROM SAID INNER CASE IN THE REGION REMOTE FROM SAID MOUTH OF SAID INNER CASE; (D) SEALING MEANS IN SAID PORT AND COUPLED TO SAID CHARGE STRUCTURE FOR SUPPORTING SAID STRUCTURE IN SAID CENTRAL BORE WITH SAID MOUTH ALIGNED WITH AND FACING SAID LATERAL PORT; AND (E) MEANS FOR DETONATING SAID EXPLOSIVE CHARGE AT A POINT REMOTE FROM SAID MOUTH.
Claim 2
Dependent Claim
127 words
A WELL PERFORATING APPARATUS WHICH COMPRISES: (A) A PRESSURE-RESISTANT HOLLOW BODY HAVING A CENTRAL BORE WITH A LATERAL PORT EXTENDING FROM SAID BORE; (B) A SHAPED CHARGE STRUCTURE HAVING AN INNER CASE WITH AN OPEN MOUTH AND A LINER CONFINING A QUANTITY OF AN EXPLOSIVE THEREBETWEEN; (C) AN OUTER CASE ENCOMPSSING AND SUPPORTING SAID INNER CASE AT ITS MOUTH AND APEX BUT MAINTAINED IN SUBSTANTIAL SPACED RELATION FROM SAID INNER CASE IN THE REGION REMOTE FROM SAID MOUTH OF SAID INNER CASE; (D) SEALING MEANS IN SAID PORT AND COUPLED TO SAID CHARGE STRUCTURE FOR SUPPORTING SAID STRUCTURE IN SAID CENTRAL BORE WITH SAID MOUTH ALIGNED WITH AND FACING SAID LATERAL PORT; AND (E) MEANS FOR DETONATING SAID EXPLOSIVE CHARGE AT A POINT REMOTE FROM SAID MOUTH.
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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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |