US3318243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static protected detonator
Assignee: Zeneca Inc
•
Filing: 1964-05-05
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Granted: 1967-05-09
•
Expires: 1984-05-05
Abstract
No abstract record available.
Inventors
- 👤 Paul H Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:18
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10; F42B3/103; F42B3/107; F42B3/18; F42B3/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
AN ELECTRIC EXPLOSION INITIATOR OF THE TYPE HAVING A SHELL MEMBER CONTAINING AN EXPLOSIVE CHARGE POSITIONED IN SAID SHELL MEMBER, AN IGNITING ASSEMBLY POSITIONED IN FIRING RELATION TO SAID CHARGE, A SEALING PLUG IN PHYSICAL CONTACT WITH SAID SHELL MEMBER, AND A PAIR OF LEG WIRES PASSING THROUGH SAID PLUG IN ELECTRICAL CONTACT THEREWITH AND ELECTRICALLY CONNECTING SAID IGNITING ASSEMBLY, WHEREIN THE COMPOSITION OF THE SEALING PLUG COMPRISES: (A) A MATRIX OF FLEXIBLE BINDING MATERIAL OF HIGH ELECTRICAL RESISTANCE HAVING THEREIN; (1) A DISPERSION OF SECONDARY ELECTRON EMITTER MATERIAL AND A NON-LINEAR RESISTANCE MATERIAL; (2) SAID SECONDARY ELECTRON EMITTER MATERIAL HAVING A PARTICLE SIZE WHICH PASSES THROUGH A 325 MESH U.S.S. SCREEN; AND (3) SAID NON-LINEAR RESISTANCE MATERIAL HAVING A PARTICLE SIZE THAT WILL PASS A 60 MESH U.S.S. SCREEN AND BE RETAINED ON A 400 MESH U.S.S. SCREEN.
Claim 2
Dependent Claim
139 words
AN ELECTRIC EXPLOSION INITIATOR OF THE TYPE HAVING A SHELL MEMBER CONTAINING AN EXPLOSIVE CHARGE POSITIONED IN SAID SHELL MEMBER, AN IGNITING ASSEMBLY POSITIONED IN FIRING RELATION TO SAID CHARGE, A SEALING PLUG IN PHYSICAL CONTACT WITH SAID SHELL MEMBER, AND A PAIR OF LEG WIRES PASSING THROUGH SAID PLUG IN ELECTRICAL CONTACT THEREWITH AND ELECTRICALLY CONNECTING SAID IGNITING ASSEMBLY, WHEREIN THE COMPOSITION OF THE SEALING PLUG COMPRISES: (A) A MATRIX OF FLEXIBLE BINDING MATERIAL OF HIGH ELECTRICAL RESISTANCE HAVING THEREIN; (1) A DISPERSION OF SECONDARY ELECTRON EMITTER MATERIAL AND A NON-LINEAR RESISTANCE MATERIAL; (2) SAID SECONDARY ELECTRON EMITTER MATERIAL HAVING A PARTICLE SIZE WHICH PASSES THROUGH A 325 MESH U.S.S. SCREEN; AND (3) SAID NON-LINEAR RESISTANCE MATERIAL HAVING A PARTICLE SIZE THAT WILL PASS A 60 MESH U.S.S. SCREEN AND BE RETAINED ON A 400 MESH U.S.S. SCREEN.
References Cited (Backward Citations)
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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) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |