US3309247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ammonium nitrate explosive with polyurethane resin prepared from nitric acid partial esters
Assignee: Zeneca Inc
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Filing: 1966-04-13
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Granted: 1967-03-14
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Expires: 1986-04-13
Abstract
No abstract record available.
Inventors
- 👤 Harold F Bluhm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:21
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105; C06B31/00; C06B31/28; C06B31/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
54 words
AN EXPLOSIVE MATERIAL COMPRISING PARTICULATE AMMONIUM NITRATE COATED WITH A POLYURETHANE RESIN COMPOSITION COMPOUNDED BY CONDENSING A REACTION MIXTURE OF A POLYISOCYANATE AND A MEMBER OF THE GROUP CONSISTING OF NITRIC ACID PARTIAL ESTERS OF POLYHYDROXY COMPOUNDS, WHEREIN THE REACTION MIXTURE INCLUDES A COMPONENT CONTAINING AT LEAST TWO RADICALS SUPPLYING HYDROGEN REACTIVE WITH ISOCYANATE.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |