Patent US3347722A successfully refreshed from Google Patents.
US3347722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thickened ammonium nitrate blasting composition containing aluminum and urea
Assignee: Arthur D Little Inc
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Filing: 1966-04-29
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Granted: 1967-10-17
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Expires: 1986-04-29
Abstract
No abstract record available.
Inventors
- 👤 William E Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:19
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A DETONATABLE WET BLASTING AGENT IN THE FORM OF A COHESIVE MASS, COMPRISING (A) A MIXTURE OF AMMONIUM NITRATE AND SODIUM NITRATE, IN WHICH SAID SODIUM NITRATE IS PRESENT IN AN AMOUNT UP TO ABOUT 25% BY WEIGHT OF SAID MIXTURE, AS AN OXIDIZER; (B) UREA AS A PRIMARY FUEL; (C) ALUMINUM AS A SECONDARY FUEL; (D) WATER; AND (E) A THICKENING AGENT; CHARACTERIZED IN THAT AT LEAST PORTIONS OF SAID AMMONIUM NITRATE-SODIUM NITRATE MIXTURE AND OF SAID UREA ARE IN SOLUTION IN SAID WATER WHEREBY THEY FORM AN ASSOCIATION COMPLEX, AND THE UNDISSOLVED PORTION OF SAID BLASTING AGENT IS RETAINED SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGHOUT THE COHESIVE MASS.
Claim 2
Dependent Claim
108 words
A DETONATABLE WET BLASTING AGENT IN THE FORM OF A COHESIVE MASS, COMPRISING (A) A MIXTURE OF AMMONIUM NITRATE AND SODIUM NITRATE, IN WHICH SAID SODIUM NITRATE IS PRESENT IN AN AMOUNT UP TO ABOUT 25% BY WEIGHT OF SAID MIXTURE, AS AN OXIDIZER; (B) UREA AS A PRIMARY FUEL; (C) ALUMINUM AS A SECONDARY FUEL; (D) WATER; AND (E) A THICKENING AGENT; CHARACTERIZED IN THAT AT LEAST PORTIONS OF SAID AMMONIUM NITRATE-SODIUM NITRATE MIXTURE AND OF SAID UREA ARE IN SOLUTION IN SAID WATER WHEREBY THEY FORM AN ASSOCIATION COMPLEX, AND THE UNDISSOLVED PORTION OF SAID BLASTING AGENT IS RETAINED SUBSTANTIALLY UNIFORMLY DISTRIBUTED THROUGHOUT THE COHESIVE MASS.
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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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |