US3279372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seismic detonator
Assignee: Imperial Chemical Industries Ltd
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Filing: 1965-06-04
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Granted: 1966-10-18
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Expires: 1985-06-04
Abstract
No abstract record available.
Inventors
- 👤 Patterson Edward Mervyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:22
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10; F42B3/103; F42B3/107; F42B3/192
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A SEISMIC DETONATOR FOR USE WHEN IMMERSED IN AND IN CONTACT WITH WATER, SAID DETECTOR COMPRISING A FUSEHEAD, AN EXPLOSIVE CHARGE AND TIME DELAY MEANS OPERATIVE WHEN SAID DETONATOR IS IMMERSED IN WATER TO SEAL SAID FUSEHEAD AND EXPLOSIVE CHARGE AGAINST CONTACT WITH THE WATER DURING POSITIONING OF SAID DETONATOR IN A BODY OF WATER AND SUBSEQUENTLY TO DESENSITIZE SAID DETONATOR IF SAID DETONATOR HAS NOT BEEN FIRED, SAID MEANS INCLUDING A CASING SURROUNDING SAID FUSEHEAD AND SAID EXPLOSIVE CHARGE, SAID CASING HAVING AN APERTURE PROVIDED WITH A WATER-DESTRUCTIBLE SEAL WHEN ON IMMERSION IN WATER, RESISTS THE INGRESS OF WATER INTO SAID CASING FOR A PREDETERMINED PERIOD OF TIME SUFFICIENT TO PERMIT SAID DETONATOR TO BE FIRED AND IS THEREAFTER AFFECTED BY THE WATER SO THAT SAID SEAL BECOMES BROKEN AND PERMITS WATER TO ENTER SAID CASING WHEREBY SAID DETONATOR IS RENDERED HARMLESS IF IT BECOMES LOST IN AN UNDERWATER LOCATION WITHOUT FIRST HAVING BEEN FIRED.
Claim 2
Dependent Claim
156 words
A SEISMIC DETONATOR FOR USE WHEN IMMERSED IN AND IN CONTACT WITH WATER, SAID DETECTOR COMPRISING A FUSEHEAD, AN EXPLOSIVE CHARGE AND TIME DELAY MEANS OPERATIVE WHEN SAID DETONATOR IS IMMERSED IN WATER TO SEAL SAID FUSEHEAD AND EXPLOSIVE CHARGE AGAINST CONTACT WITH THE WATER DURING POSITIONING OF SAID DETONATOR IN A BODY OF WATER AND SUBSEQUENTLY TO DESENSITIZE SAID DETONATOR IF SAID DETONATOR HAS NOT BEEN FIRED, SAID MEANS INCLUDING A CASING SURROUNDING SAID FUSEHEAD AND SAID EXPLOSIVE CHARGE, SAID CASING HAVING AN APERTURE PROVIDED WITH A WATER-DESTRUCTIBLE SEAL WHEN ON IMMERSION IN WATER, RESISTS THE INGRESS OF WATER INTO SAID CASING FOR A PREDETERMINED PERIOD OF TIME SUFFICIENT TO PERMIT SAID DETONATOR TO BE FIRED AND IS THEREAFTER AFFECTED BY THE WATER SO THAT SAID SEAL BECOMES BROKEN AND PERMITS WATER TO ENTER SAID CASING WHEREBY SAID DETONATOR IS RENDERED HARMLESS IF IT BECOMES LOST IN AN UNDERWATER LOCATION WITHOUT FIRST HAVING BEEN FIRED.
References Cited (Backward Citations)
US2759417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |