Patent US3563806A successfully refreshed from Google Patents.
Patent US3985592A successfully refreshed from Google Patents.
US3985592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface-inhibited propellent charge
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1968-06-11
•
Granted: 1976-10-12
•
Expires: 1988-06-11
Abstract
Abstract 1. A surface-inhibited propellent charge comprising a charge of propellent composition having bonded to at least part of its surface an inhibiting layer comprising silicone rubber supported on biaxially-stretchable glass fabric.
Inventors
- 👤 Clarence Bertram Hackett
- 👤 James Jack
- 👤 Richard Paton Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:38
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0083; C06B45/00; C06B45/12
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
30 words
A surface-inhibited propellent charge comprising a charge of propellent composition having bonded to at least part of its surface an inhibiting layer comprising silicone rubber supported on biaxially-stretchable glass fabric.
Claim 2
Dependent Claim
30 words
A surface-inhibited propellent charge comprising a charge of propellent composition having bonded to at least part of its surface an inhibiting layer comprising silicone rubber supported on biaxially-stretchable glass fabric.
Claim 3
Dependent Claim
25 words
A surface-inhibited propellent charge as claimed in claim 1 wherein the propellent comprises a nitric ester and the silicone rubber is room temperature cured rubber.
Claim 4
Dependent Claim
59 words
A process for the preparation of a surface-inhibited propellent charge as claimed in claim 1 which comprises coating the surface of the propellent charge with a priming coat of uncured silicone rubber or resin, placing biaxially-stretchable glass fabric in contact with the priming coat, applying a coating of uncured silicone rubber to the glass fabric and curing the silicone.
Claim 5
Dependent Claim
78 words
A surface-inhibited propellent charge as in claim 1 wherein said propellent composition is selected from the group consisting of double-base propellents and composite propellents which comprise an organic fuel binder and a material selected from the group consisting of an organic nitramine and at least one salt selected from the group consisting of the ammonium, alkali metal and alkaline earth metal salts of nitric acid and the ammonium, alkali metal and alkaline earth metal salts of perchloric acid.
Claim 6
Dependent Claim
21 words
A surface-inhibited propellent charge as claimed in claim 1 wherein said supporting structure includes at least two layers of glass fabric.
Claim 7
Dependent Claim
19 words
A surface-inhibited propellent charge as claimed in claim 1 wherein the silicone rubber completely covers and impregnates the fabric.
Claim 8
Dependent Claim
22 words
A surface-inhibited propellent charge as claimed in claim 1 wherein said layer has a thickness in the range 0.75 to 2.5 millimeters.
Claim 9
Dependent Claim
17 words
A surface-inhibited propellent charge as claimed in claim 1 wherein the glass fabric comprises knitted glass fabric.
Claim 10
Dependent Claim
20 words
A surface-inhibited propellent charge as claimed in claim 1 wherein the glass fabric is in the form of a sleeve.
Claim 11
Dependent Claim
22 words
A surface-inhibited propellent charge as claimed in claim 1 wherein said fabric is made from glass yarn of 1,000 to 2,000 denier.
Claim 12
Dependent Claim
51 words
A surface-inhibited propellent charge as in claim 1 wherein said rubber is made from a material selected from the group consisting of polydimethylsiloxane and polydimethylsiloxane modified by the inclusion of a substituent selected from the group consisting of vinyl substituents and phenyl substituents cured by means of a free-radical curing agent.
Claim 13
Dependent Claim
18 words
A surface-inhibited propellent charge as claimed in claim 11 wherein the rubber has been cured by 2,4-dichlorobenzoyl peroxide.
Claim 14
Dependent Claim
16 words
A surface-inhibited propellent charge as claimed in claim 1 wherein the silicone rubber comprises R.T.V. rubber.
Claim 15
Dependent Claim
29 words
A surface-inhibited propellent charge as claimed in claim 13 wherein the room temperature cured rubber is made from hydroxyl-ended polydimethylsiloxane cured by means of a chain-extending and cross-linking agent.
Claim 16
Dependent Claim
60 words
A surface-inhibited propellent charge as claimed in claim 14 wherein the silicone rubber comprises room temperature cured rubber made from hydroxyl-ended polydimethylsiloxane cured by a curing composition selected from the group consisting of (a) a silicate ester in presence of an organo-tin compound, (b) an acetoxy silane in presence of water of (c) an oxime silane in presence of water.
Claim 17
Dependent Claim
36 words
A surface-inhibited propellent charge as claimed in claim 15 wherein the room temperature cured rubber has been cured by a curing agent selected from the group consisting of ethyl silicate, methyl triacetoxysilane or methyl tris(acetoximino) silane.
Claim 18
Dependent Claim
37 words
A surface-inhibited propellent charge as claimed in claim 16 wherein the room temperature cured rubber has been cured by a curing agent selected from the group consisting of a silicate ester and dibutyl-tin dilurate or stannous octoate.
Claim 19
Dependent Claim
16 words
A surface-inhibited propellent charge as claimed in claim 1 wherein the silicone rubber contains a filler.
Claim 20
Dependent Claim
25 words
A surface-inhibited propellent charge as claimed in claim 18 wherein the filler is selected from the group consisting of calcium carbonate, silica or iron oxide.
References Cited (Backward Citations)
US3054253A
Cited
US3269113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |