Patent US3636882A successfully refreshed from Google Patents.
US3636882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deterrent coating for propellent grains
Assignee: United States Department of the Army
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Filing: 1964-07-14
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Granted: 1972-01-25
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Expires: 1984-07-14
Abstract
Abstract 1. A method of preparing progressive-burning, multiple-base propellants comprising tumbling grains of propellant having a perforation through the length of the grain with a powder mixture consisting essentially of about 65 percent copper resinate and about 35 percent lead naphthenate by weight and then applying heat to said grains and powder mixture during tumbling to soften said powder mixture sufficiently to form a continuous, adherent coating on said grains.
Inventors
- 👤 Henry A Aaronson
- 👤 Frank R Schwartz
- 👤 Bernard Sukornick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:44
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/18; C06B45/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
68 words
A METHOD OF PREPARING PROGRESSIVE-BURNING, MULTIPLEBASE PROPELLANTS COMPRISING TUMBLING GRAINS OF PROPELLANT HAVING A PERFORATION THROUGH THE LENGTH OF THE GRAIN WITH A POWDER MIXTURE CONSISTING ESSENTIALLY OF ABOUT 65 PERCENT COPPER RESINATE AND ABOUT 35 PERCENT LEAD NAPHTHENATE BY WEIGHT AND THEN APPLYING HEAT TO SAID GRAINS AND POWDER MIXTURE DURING TUMBLING TO SOFTEN SAID POWDER MIXTURE SUFFICIENTLY TO FORM A CONTINOUS. ADHERENT COATING ON SAID GRAINS.
Claim 2
Independent Claim
68 words
A METHOD OF PREPARING PROGRESSIVE-BURNING, MULTIPLEBASE PROPELLANTS COMPRISING TUMBLING GRAINS OF PROPELLANT HAVING A PERFORATION THROUGH THE LENGTH OF THE GRAIN WITH A POWDER MIXTURE CONSISTING ESSENTIALLY OF ABOUT 65 PERCENT COPPER RESINATE AND ABOUT 35 PERCENT LEAD NAPHTHENATE BY WEIGHT AND THEN APPLYING HEAT TO SAID GRAINS AND POWDER MIXTURE DURING TUMBLING TO SOFTEN SAID POWDER MIXTURE SUFFICIENTLY TO FORM A CONTINOUS. ADHERENT COATING ON SAID GRAINS.
Claim 3
Dependent Claim
22 words
A method as in claim 1 which includes the step of tumbling said coated grains until they are cooled to room temperature.
Claim 4
Independent Claim
72 words
A method of preparing progressive-burning, multiple-base propellants comprising selecting small, extruded grains of propellant having a perforation through the length of the grain and tumbling said grains at a temperature of about 80* C. with a mixture of organometallic compounds having a softening point at about 80* C. to form an organometallic coating thereon, said coating being composed of about 65 percent copper resinate and about 35 percent lead naphthenate by weight.
Claim 5
Independent Claim
72 words
A method of preparing progressive-burning, multiple-base propellants comprising selecting small, extruded grains of propellant having a perforation through the length of the grain and tumbling said grains at a temperature of about 80* C. with a mixture of organometallic compounds having a softening point at about 80* C. to form an organometallic coating thereon, said coating being composed of about 65 percent copper resinate and about 35 percent lead naphthenate by weight.
Claim 6
Dependent Claim
30 words
A method as in claim 3 wherein the copper resinate and lead naphthenate mixture is added in the amount of 3.5 + or - 0.5 percent by weight of propellant.
References Cited (Backward Citations)
US3010399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |