Patent US2760434A successfully refreshed from Google Patents.
US2760434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosive
Assignee: Olin Corp
•
Filing: 1952-01-10
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Granted: 1956-08-28
•
Expires: 1972-01-10
Abstract
No abstract record available.
Inventors
- 👤 John A Ruth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:16
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
A WELL BORE HOLE PERFORATING DEVICE COMPRISING A CONTAINER HAVING A BASE PORTION AND A NOSE PORTION FRICTIONALLY FIT TOGETHER, AN IMPACT SENSITIVE EXPLOSIVE CHARGE AND A CHARGE OF WAX COATED METHYLENEDINITRAMINE COMPRESSED TO A DENSITY OF AT LEAST 1.7 IN SAID CONTAINER, THE SURFACE OF THE METHYLENEDINITRAMINE CHARGE FACING THE NOSE PORTION HAVING A CAVITY THEREIN AND A NON-EXPLOSIVE LINER COVERING AND IN ENGAGEMENT WITH THE SURFACE OF SAID CAVITY.
References Cited (Backward Citations)
US2563131A
Cited
US989375A
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US2399211A
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GB574271A
Cited
US2413680A
Cited
US2415814A
Cited
US2494256A
Cited
US2649046A
Cited
US2629325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |