US3679781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding plastic coated nitrocellulose
Assignee: Remington Arms Co LLC
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Filing: 1969-10-17
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Granted: 1972-07-25
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Expires: 1989-10-17
Abstract
Abstract A hot-molded solid propellant or priming charge and the method of making the charge. Nitrocellulose grains are coated with plasticized polyvinyl acetate and then heated and compression molded whereupon the hot molded components retain their geometry and dimensional recovery is negligible. High explosive can be added to the charge prior to molding in order to improve quickness and burning rate of the charge.
Inventors
- 👤 Theodore A Olson
- 👤 John J Scanlon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:25
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105; C06B21/00; C06B21/0033; C06B21/005; C06B45/18; C06B45/20; C06B45/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
18 words
heating the binder-coated nitrocellulose propellant grains to a temperature of between about 180* F. to about 230* F;
Claim 2
Dependent Claim
44 words
A method of molding a solid propellant charge as recited in Claim 1 wherein said nitrocellulose propellant grains are uniformly coated with a high explosive prior to being coated with said plastic binder so as to increase the quickness of the solid propellant charge.
Claim 3
Dependent Claim
17 words
heating the coated explosive grains to a temperature of between about 180* to about 230* F., and
Claim 4
Dependent Claim
15 words
compression molding the heated explosive grains under about 10,000 p.s.i. pressure into the desired configuration.
Claim 5
Dependent Claim
19 words
A method of molding a solid propellant charge as recited in Claim 2 wherein said high explosive is PETN.
Claim 6
Dependent Claim
26 words
compression molding the heated and plastic binder-coated propellant grains under pressure of between about 6,000 psi to about 10,000 psi into the desired configuration and dimensions.
Claim 7
Independent Claim
12 words
A method of molding a solid primer charge comprising the steps of:
Claim 8
Dependent Claim
48 words
A method of molding a solid propellant charge as recited in claim 1 in which the coating step comprises the distributing of the desired quantity of plasticized thermoplastic binder on to the nitrocellulose grains followed by tumbling of the coated propellant grains and finally drying of the mixture.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |