Patent US3967968A successfully refreshed from Google Patents.
US3967968A
Expired / Lapsed
US
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Band ply dope compositions
Assignee: Bridgestone Firestone Inc
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Filing: 1974-11-29
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Granted: 1976-07-06
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Expires: 1994-11-29
Abstract
Abstract This disclosure relates to an improved band ply lubricant to be utilized in tire curing operations. The composition of this band ply dope or lubricant comprises a liquid phase, a thickening agent, a fine solid material, and a high viscosity lubricant. These materials are present in precise ratios so that the band ply dope composition exhibits a thixotropic character.
Inventors
- 👤 Christopher Robin Stone
- 👤 Brian Matthew Eugene McGarry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:08
CPC Classifications
B; B29; B29C; B29C37/00; B29C37/0067; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/64; C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; B29K; B29K2021/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
171 words
A band ply dope in the form of a thixotropic composition, maintainable as a viscous sprayable material by moderate agitation which rapidly sets to a gel when agitation is terminated, such composition comprising an azeotropic mixture of isopropyl alcohol and water as the volatile liquid phase, such mixture having sufficient water to yield a boiling point below 90°C., a hydroxybutyl methyl cellulose thickening agent capable of imparting thixotropic properties to said liquid, a filler selected from the group consisting of finely divided mica and finely divided graphite, a high viscosity lubricant having a viscosity in excess of 2,000 centipoises at 20°C. and selected from the group consisting of a silicone oil and a silicone - polyglycol copolymer, said dope having 1.5 to 4 parts of said thickening agent, 10 to 40 parts of said finely divided filler, and 1 to 15 parts of said lubricant, all per 100 parts of said liquid phase, said dope composition being capable of drying to a strong, tough film containing said dispersed lubricant and filler.
Claim 2
Dependent Claim
171 words
A band ply dope in the form of a thixotropic composition, maintainable as a viscous sprayable material by moderate agitation which rapidly sets to a gel when agitation is terminated, such composition comprising an azeotropic mixture of isopropyl alcohol and water as the volatile liquid phase, such mixture having sufficient water to yield a boiling point below 90°C., a hydroxybutyl methyl cellulose thickening agent capable of imparting thixotropic properties to said liquid, a filler selected from the group consisting of finely divided mica and finely divided graphite, a high viscosity lubricant having a viscosity in excess of 2,000 centipoises at 20°C. and selected from the group consisting of a silicone oil and a silicone - polyglycol copolymer, said dope having 1.5 to 4 parts of said thickening agent, 10 to 40 parts of said finely divided filler, and 1 to 15 parts of said lubricant, all per 100 parts of said liquid phase, said dope composition being capable of drying to a strong, tough film containing said dispersed lubricant and filler.
Claim 3
Dependent Claim
170 words
A band ply dope in the form of a thixotropic composition, maintainable as a viscous sprayable material by moderate agitation which rapidly sets to a gel when agitation is terminated, such composition comprising an azeotropic mixture of isopropyl alcohol and water as the volatile liquid phase, such mixture having sufficient water to yield a boiling point below 90°C., a hydroxypropyl cellulose thickening agent capable of imparting thixotropic properties to said liquid, a filler selected from the group consisting of finely divided mica and finely divided graphite, a high viscosity lubricant having a viscosity in excess of 2,000 centipoises at 20°C. and selected from the group consisting of a silicone oil and a silicone - polyglycol copolymer, said dope having 1.5 to 4 parts of said thickening agent, 10 to 40 parts of said finely divided filler, and 1 to 15 parts of said lubricant, all per 100 parts of said liquid phase, said dope composition being capable of drying to a strong, tough film containing said dispersed lubricant and filler.
Claim 4
Dependent Claim
170 words
A band ply dope in the form of a thixotropic composition, maintainable as a viscous sprayable material by moderate agitation which rapidly sets to a gel when agitation is terminated, such composition comprising an azeotropic mixture of isopropyl alcohol and water as the volatile liquid phase, such mixture having sufficient water to yield a boiling point below 90°C., a hydroxypropyl cellulose thickening agent capable of imparting thixotropic properties to said liquid, a filler selected from the group consisting of finely divided mica and finely divided graphite, a high viscosity lubricant having a viscosity in excess of 2,000 centipoises at 20°C. and selected from the group consisting of a silicone oil and a silicone - polyglycol copolymer, said dope having 1.5 to 4 parts of said thickening agent, 10 to 40 parts of said finely divided filler, and 1 to 15 parts of said lubricant, all per 100 parts of said liquid phase, said dope composition being capable of drying to a strong, tough film containing said dispersed lubricant and filler.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |