Patent US2635543A successfully refreshed from Google Patents.
US2635543A
Expired / Lapsed
US
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Container for safety blasting explosives
Assignee: Imperial Chemical Industries Ltd
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Filing: 1948-01-22
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Granted: 1953-04-21
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Expires: 1968-01-22
Abstract
No abstract record available.
Inventors
- 👤 Sillitto George Percy
- 👤 Ashcroft Donald George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:31
CPC Classifications
C; C06; C06C; C06C5/00; F; F42; F42B; F42B3/00; F42B3/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A SAFETY BLASTING EXPLOSIVE CHARGE CONTAINER CONSISTING INTERNALLY OF A LENGTH OF WAXED PAPER SHEET AND EXTERNALLY OF A LENGTH OF UNWAXED PAPER SHEET, THE WAXED AND UNWAXED PAPER SHEETS BEING SEPARATED ONE FROM THE OTHER BY A FLAME QUENCHING FELT SHEET, SAID FLAME QUENCHING FELT SHEET COMPRISING A UNIFORM MIXTURE OF A FIBROUS BINDING AGENT AND A PREPONDERATING PROPORTION OF AT LEAST ONE POWDERED FLAME COOLING COMPOUND, AND HAVING AT ONE END THE LENGTH OF UNWAXED PAPER SHEET CEMENTED ACROSS ITS WIDTH, AND AT ITS OTHER END THE LENGTH OF WAXED PAPER SHEET CEMENTED ACROSS ITS WIDTH, WHEREIN THE WIDTH OF THE SHEET OF FLAME QUENCHING FELT MATERIAL AND UNWAXED PAPER CORRESPOND SUBSTANTIALLY TO THE LENGTH OF THE EXPLOSIVE CHARGE TO BE HELD BY THE CONTAINER AND THE WIDTH OF THE WAXED PAPER IS SUCH THAT IT PROJECTS AT EACH SIDE OF THE FELT MATERIAL AND THEREBY PROVIDES END-CLOSURE MEANS, AND WHEREIN THE JOINED LENGTHS OF THE FELT MATERIAL, WAXED, AND UNWAXED SHEETS WHICH COMPRISE THE COMFINES OF THE SAID CONTAINER, ARE IN A DESIRED NUMBER OF LAYERS OF EACH OF THE SAME.
Claim 2
Dependent Claim
184 words
A SAFETY BLASTING EXPLOSIVE CHARGE CONTAINER CONSISTING INTERNALLY OF A LENGTH OF WAXED PAPER SHEET AND EXTERNALLY OF A LENGTH OF UNWAXED PAPER SHEET, THE WAXED AND UNWAXED PAPER SHEETS BEING SEPARATED ONE FROM THE OTHER BY A FLAME QUENCHING FELT SHEET, SAID FLAME QUENCHING FELT SHEET COMPRISING A UNIFORM MIXTURE OF A FIBROUS BINDING AGENT AND A PREPONDERATING PROPORTION OF AT LEAST ONE POWDERED FLAME COOLING COMPOUND, AND HAVING AT ONE END THE LENGTH OF UNWAXED PAPER SHEET CEMENTED ACROSS ITS WIDTH, AND AT ITS OTHER END THE LENGTH OF WAXED PAPER SHEET CEMENTED ACROSS ITS WIDTH, WHEREIN THE WIDTH OF THE SHEET OF FLAME QUENCHING FELT MATERIAL AND UNWAXED PAPER CORRESPOND SUBSTANTIALLY TO THE LENGTH OF THE EXPLOSIVE CHARGE TO BE HELD BY THE CONTAINER AND THE WIDTH OF THE WAXED PAPER IS SUCH THAT IT PROJECTS AT EACH SIDE OF THE FELT MATERIAL AND THEREBY PROVIDES END-CLOSURE MEANS, AND WHEREIN THE JOINED LENGTHS OF THE FELT MATERIAL, WAXED, AND UNWAXED SHEETS WHICH COMPRISE THE COMFINES OF THE SAID CONTAINER, ARE IN A DESIRED NUMBER OF LAYERS OF EACH OF THE SAME.
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) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |