US3902933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primer composition of nitromethane, polymeric foam, and hollow spheres
Assignee: Commercial Solvents Corp
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Filing: 1973-08-16
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Granted: 1975-09-02
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Expires: 1993-08-16
Abstract
Abstract A primer adapted to initiating detonation of nitromethane by strong shock comprising an open-celled polymeric foam containing about 15-85 percent by weight of glass bubbles.
Inventors
- 👤 O Wayne Chandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:53
CPC Classifications
C; C06; C06B; C06B25/00; C06B25/36; C06B23/00; C06B23/002; C06B23/003; C08; C08J; C08J9/00; C08J9/32
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
48 words
A PRIMER ADAPTED TO INTIATING DETONATION OR NITROMETHANE BY STRONG SHOCK CONSISTING ESSENTIALLY OF THE COMBINATION OF AN OPEN-CELLED POLYMERIC FOAM HAVING DISPERED THEREIN FROM ABOUT 15 TO ABOUT 85 PERCENT BY WEIGHT OF HOLLOW THINWALLED MICROSPHERES CONTAINING ENTRAPPED AIR SAID FOAM BEING IN INTIMATE CONTACT WITH NITROMETHANE.
Claim 2
Dependent Claim
48 words
A PRIMER ADAPTED TO INTIATING DETONATION OR NITROMETHANE BY STRONG SHOCK CONSISTING ESSENTIALLY OF THE COMBINATION OF AN OPEN-CELLED POLYMERIC FOAM HAVING DISPERED THEREIN FROM ABOUT 15 TO ABOUT 85 PERCENT BY WEIGHT OF HOLLOW THINWALLED MICROSPHERES CONTAINING ENTRAPPED AIR SAID FOAM BEING IN INTIMATE CONTACT WITH NITROMETHANE.
Claim 3
Dependent Claim
22 words
The combination of claim 1 wherein said polymeric foam is polyurethane having a density of from about 0.02 to about 0.04 g/ml.
Claim 4
Dependent Claim
15 words
The combination of claim 1 wherein said microspheres are of phenol-formaldehyde, urea-formaldehyde, glass or ceramic.
Claim 5
Dependent Claim
28 words
The combination of claim 3 wherein said microspheres are glass bubbles of about 20 to 100 microns and have a true particle density between 0.3 and 0.4 g/cc.
Claim 6
Dependent Claim
17 words
The combination of claim 1 wherein said microspheres are dispersed throughout the polymeric foam including the surface.
Claim 7
Dependent Claim
17 words
The combination of claim 1 wherein said microspheres are embedded at the surface of said polymeric foam.
References Cited (Backward Citations)
US3697668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |