US2845833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing explosive elements
Assignee: Imperial Chemical Industries Ltd
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Filing: 1955-09-12
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Granted: 1958-08-05
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Expires: 1975-09-12
Abstract
No abstract record available.
Inventors
- 👤 Davidson Samuel Henry
- 👤 Reid Thomas James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:10
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0091; F; F42; F42B; F42B3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A METHOD OF PRODUCING EXPLOSIVE ELEMENTS PARTICULARLY SUITABLE FOR USE AT HIGH HYDROSTATIC PRESSURE WHICH COMPRISES PACKING A CHARGE OF AN AMMONIUM NITRATE POWDER EXPLOSIVE CONTAINING AT LEAST 75% BY WEIGHT OF AMMONIUM NITRATE IV AND A SMALL AMOUNT OF WATER INTO A THIN SHEET METAL CANISTER, SUBJECTING THE CANISTER AFTER SEALING TO SUCH A TEMPERATURE AND FOR SUCH A PERIOD OF TIME THAT AT LEAST A LAYER OF THE EXPLOSIVE CLOSE TO THE SIDES OF THE CANISTER ATTAINS A TEMPERATURE WHICH IS AT LEAST THE TRANSITION TEMPERATURE FOR AMMONIUM NITRATE IV TO AMMONIUM NITRATE III, IS BELOW THE FUSION POINT OF ANY SOLID FUSIBLE ORGANIC SENSITISING AGET WHICH MAY BE INCLUDED IN THE EXPLOSIVE, AND DOES NOT EXCEED 80*C., AND THEREAFTER ALLOWING THE CANISTER TO COOL SO THAT THE EXPLOSIVE WHICH IS AT LEAST AT SAID TRANSISTION TEMPERATURE IS CONVERTED INTO HARDENED EXPLOSIVE.
Claim 2
Independent Claim
144 words
A METHOD OF PRODUCING EXPLOSIVE ELEMENTS PARTICULARLY SUITABLE FOR USE AT HIGH HYDROSTATIC PRESSURE WHICH COMPRISES PACKING A CHARGE OF AN AMMONIUM NITRATE POWDER EXPLOSIVE CONTAINING AT LEAST 75% BY WEIGHT OF AMMONIUM NITRATE IV AND A SMALL AMOUNT OF WATER INTO A THIN SHEET METAL CANISTER, SUBJECTING THE CANISTER AFTER SEALING TO SUCH A TEMPERATURE AND FOR SUCH A PERIOD OF TIME THAT AT LEAST A LAYER OF THE EXPLOSIVE CLOSE TO THE SIDES OF THE CANISTER ATTAINS A TEMPERATURE WHICH IS AT LEAST THE TRANSITION TEMPERATURE FOR AMMONIUM NITRATE IV TO AMMONIUM NITRATE III, IS BELOW THE FUSION POINT OF ANY SOLID FUSIBLE ORGANIC SENSITISING AGET WHICH MAY BE INCLUDED IN THE EXPLOSIVE, AND DOES NOT EXCEED 80*C., AND THEREAFTER ALLOWING THE CANISTER TO COOL SO THAT THE EXPLOSIVE WHICH IS AT LEAST AT SAID TRANSISTION TEMPERATURE IS CONVERTED INTO HARDENED EXPLOSIVE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |