Patent US3829537A successfully refreshed from Google Patents.
US3829537A
Expired / Lapsed
US
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Method of making sponge propellant
Assignee: Individual
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Filing: 1954-08-27
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Granted: 1974-08-13
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Expires: 1974-08-27
Abstract
Abstract 1. A method of forming a shaped, propellant charge having a sponge-like cellular structure which comprises incorporating in a colloided nitrocellulose composition a solvent for an inert gas, placing the said composition in a suitable mold, subjecting said composition to an atmosphere of inert gas at elevated pressures and to heat not exceeding 65*C, and then releasing the gaseous pressure whereby the explosive composition is expanded to form a unitary, spongy structure substantially in the form of the mold.
Inventors
- 👤 H Rosenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:25
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0091
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
78 words
A METHOD OF FORMING A SHAPED. PROPELLANT CHARGE HAVING A SPONGE-LIKE CELLULAR STRUCTURE WHICH COMPRISES INCORPORATING IN A COLLOIDED NITROCELLULOSE COMPOSITION A SOLVENT FOR AN INERT GS, PLACING THE SAID COMPOSITION IN A SUITABLE MOLD, SUBJECTING SAID COMPOSITION TO AN ATMOSPHERE OF INERT GAS AT ELEVATEF PRESSURES AND TO HEAT NOT EXCEEDING 60*C, AND THEN RELEASING THE GASEOUS PRESSURE WHEREBY THE EXPLOSIVE COMPOSITION IS EXPANDED TO FORM A UNITARY, SPONGY STRUCTURE SUBSTANTIALLY IN THE FORM OF THE MOLD.
Claim 2
Independent Claim
78 words
A METHOD OF FORMING A SHAPED. PROPELLANT CHARGE HAVING A SPONGE-LIKE CELLULAR STRUCTURE WHICH COMPRISES INCORPORATING IN A COLLOIDED NITROCELLULOSE COMPOSITION A SOLVENT FOR AN INERT GS, PLACING THE SAID COMPOSITION IN A SUITABLE MOLD, SUBJECTING SAID COMPOSITION TO AN ATMOSPHERE OF INERT GAS AT ELEVATEF PRESSURES AND TO HEAT NOT EXCEEDING 60*C, AND THEN RELEASING THE GASEOUS PRESSURE WHEREBY THE EXPLOSIVE COMPOSITION IS EXPANDED TO FORM A UNITARY, SPONGY STRUCTURE SUBSTANTIALLY IN THE FORM OF THE MOLD.
Claim 3
Independent Claim
82 words
A method of forming a shaped, propellant charge which comprises incorporating in a colloided nitrocellulose composition an alkyl acetate as a solvent for a gas which is inert to said composition, placing the said composition in a suitable mold, subjecting said composition to an atmosphere of inert gas at elevated pressures and to heat not exceeding 65*C, and then releasing the gaseous pressure whereby the explosive composition is expanded to form a unitary, spongy structure substantially in the form of the mold.
Claim 4
Independent Claim
82 words
A method of forming a shaped, propellant charge which comprises incorporating in a colloided nitrocellulose composition an alkyl acetate as a solvent for a gas which is inert to said composition, placing the said composition in a suitable mold, subjecting said composition to an atmosphere of inert gas at elevated pressures and to heat not exceeding 65*C, and then releasing the gaseous pressure whereby the explosive composition is expanded to form a unitary, spongy structure substantially in the form of the mold.
Claim 5
Dependent Claim
13 words
The method recited in claim 2 wherein said alkyl acetate is ethyl acetate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |