Patent US4183814A successfully refreshed from Google Patents.
US4183814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asbestos composition having organo-silane coating
Assignee: KCAC Inc
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Filing: 1978-01-03
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Granted: 1980-01-15
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Expires: 1998-01-03
Abstract
Abstract A chrysotile asbestos base material having a precipitation deposited siliceous layer and an organo-silane coating bonded to and overlying said siliceous layer.
Inventors
- 👤 Sundaresan Ramachandran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:38
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/032; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/40; C03C25/42; Y; Y10; Y10S; Y10S507/00; Y10S507/901; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/294; Y10T428/2942
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
25 words
An asbestos base material comprising opened chrysotile asbestos having a precipitation deposited siliceous layer and an organo-silane coating bonded to and over-lying said siliceous layer.
Claim 2
Dependent Claim
25 words
An asbestos base material comprising opened chrysotile asbestos having a precipitation deposited siliceous layer and an organo-silane coating bonded to and over-lying said siliceous layer.
Claim 3
Dependent Claim
25 words
A drilling fluid for use in oil and gas drilling operations containing from about 0.10 to 7% by weight of the material of claim 1.
Claim 4
Independent Claim
62 words
A method for producing organo-silane coated asbestos base material which comprises: (i) providing opened chrysotile asbestos material having a precipitation deposited siliceous outer layer in an aqueous media at a pH of about 6 to 9 (ii) contacting said material with organo-silane to provide an organo-silane coating on said siliceous layer (iii) recovering the organo-silane coated asbestos base material from the slurry.
Claim 5
Independent Claim
62 words
A method for producing organo-silane coated asbestos base material which comprises: (i) providing opened chrysotile asbestos material having a precipitation deposited siliceous outer layer in an aqueous media at a pH of about 6 to 9 (ii) contacting said material with organo-silane to provide an organo-silane coating on said siliceous layer (iii) recovering the organo-silane coated asbestos base material from the slurry.
Claim 6
Independent Claim
135 words
A method for coating chrysotile asbestos with an organo-silane which comprises: (i) providing an aqueous slurry of opened chrysotile asbestos (ii) providing in mixture with the slurry a solution of a material capable of preciptitating a silica gel (iii) treating the mixture of slurry and solution with a neutralizing agent to obtain a pH of about 9.5 or less in the slurry-solution mixture to thereby cause precipitation of siliceous material onto the asbestos in the slurry and provide a siliceous layer thereon (iv) further treating the slurry with a neutralizing agent to the extent necessary to provide a pH in the range of about 6 to 9. (v) adding organo-silane to the slurry of step (iv) to thereby provide an organo-silane coating on said siliceous layer (vi) recovering organo-silane coated chrysotile asbestos from the slurry.
Claim 7
Independent Claim
135 words
A method for coating chrysotile asbestos with an organo-silane which comprises: (i) providing an aqueous slurry of opened chrysotile asbestos (ii) providing in mixture with the slurry a solution of a material capable of preciptitating a silica gel (iii) treating the mixture of slurry and solution with a neutralizing agent to obtain a pH of about 9.5 or less in the slurry-solution mixture to thereby cause precipitation of siliceous material onto the asbestos in the slurry and provide a siliceous layer thereon (iv) further treating the slurry with a neutralizing agent to the extent necessary to provide a pH in the range of about 6 to 9. (v) adding organo-silane to the slurry of step (iv) to thereby provide an organo-silane coating on said siliceous layer (vi) recovering organo-silane coated chrysotile asbestos from the slurry.
Claim 8
Dependent Claim
14 words
A material in accordance with claim 1 wherein the organo-silane is octyl triethoxy silane.
Claim 9
Dependent Claim
14 words
A method in accordance with claim 3 wherein the organo-silane is octyl triethoxy silane.
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) | 1983-01-14 | 1983-07-16 | 1984-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-14 | 1987-07-16 | 1988-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-14 | 1991-07-16 | 1992-01-15 | $7700.00 | Window Closed / Lapsed |