US4085173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of solid propellant
Assignee: Hercules LLC
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Filing: 1964-10-05
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Granted: 1978-04-18
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Expires: 1984-10-05
Abstract
Abstract 1. A method manufacturing solid propellant grains comprising: Providing an elongated center core, Disposing metal filaments radially extending therefrom, Inserting said core and filaments in a porous cylinder having a diameter less than that of said core and filaments, whereby said filaments protrude through said cylinder, Bonding said protruding ends of said filaments to said porous cylinder, Casting a solid propellant matrix between said porous cylinder and said core And curing said propellant matrix.
Inventors
- 👤 George F. Lomax, Jr.
- 👤 Arthur A. Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:12
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/26; C; C06; C06B; C06B45/00; F02K9/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
73 words
A method manufacturing solid propellant grains comprising: providing an elongated center core, disposing metal filaments radially extending therefrom, inserting said core and filaments in a porous cylinder having a diameter less than that of said core and filaments, whereby said filaments protrude through said cylinder, bonding said protruding ends of said filaments to said porous cylinder, casting a solid propellant matrix between said porous cylinder and said core and curing said propellant matrix.
Claim 2
Independent Claim
73 words
A method manufacturing solid propellant grains comprising: providing an elongated center core, disposing metal filaments radially extending therefrom, inserting said core and filaments in a porous cylinder having a diameter less than that of said core and filaments, whereby said filaments protrude through said cylinder, bonding said protruding ends of said filaments to said porous cylinder, casting a solid propellant matrix between said porous cylinder and said core and curing said propellant matrix.
Claim 3
Dependent Claim
14 words
The method of claim 1 additionally comprising removing said core from said cured propellant.
Claim 4
Dependent Claim
15 words
The method of claim 1 additionally comprising removing said porous cylinder from said cured propellant.
Claim 5
Dependent Claim
23 words
The method of claim 1 additionally comprising rotating said porous cylinder relative to said core whereby torque is applied to said bonded filaments.
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) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |