Patent US4451537A successfully refreshed from Google Patents.
US4451537A
Expired / Lapsed
US
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Asbestos composition having organo-silane coating
Assignee: KCAC Inc
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Filing: 1981-06-30
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Granted: 1984-05-29
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Expires: 2001-06-30
Abstract
Abstract A crysotile asbestos base material having an organo-silane outer coating bonded thereto.
Inventors
- 👤 Robert J. Kennedy, Sr.
- 👤 Robert J. Kennedy, Jr.
- 👤 Sundaresan Ramachandran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:35
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/40; C09; C09C; C09C1/00; C09C1/28; C09C3/00; C09C3/12; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/032; C01; C01P; C01P2004/00; C01P2004/80; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2962; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
26 words
An asbestos base material comprising opened chrysotile asbestos having an outer octahedral magnesia layer and an organo-silane coating bonded thereto and overlying the asbestos base material.
Claim 2
Dependent Claim
26 words
An asbestos base material comprising opened chrysotile asbestos having an outer octahedral magnesia layer and an organo-silane coating bonded thereto and overlying the asbestos base material.
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
65 words
A method for producing organo-silane coated asbestos base material which comprises: (i) providing opened untreated chrysotile asbestos material having an outer octahedral magnesia layer intact in an aqueous media at a pH of about 10 to 12; (ii) contacting said asbestos material with organo-silane to provide an organo-silane coating on said asbestos material; and (iii) recovering the organo-silane coated asbestos base material from the slurry.
Claim 5
Independent Claim
65 words
A method for producing organo-silane coated asbestos base material which comprises: (i) providing opened untreated chrysotile asbestos material having an outer octahedral magnesia layer intact in an aqueous media at a pH of about 10 to 12; (ii) contacting said asbestos material with organo-silane to provide an organo-silane coating on said asbestos material; and (iii) recovering the organo-silane coated asbestos base material from the slurry.
Claim 6
Independent Claim
81 words
A method for coating chrysotile asbestos with an organo-silane which comprises: (i) providing an aqueous slurry of opened untreated chrysotile asbestos having an outer octahedral magnesia layer intact; (ii) treating the slurry with caustic reagent to the extent necessary to provide a pH in the range of about 10 to 12; (iii) adding organo-silane to the slurry of step (ii) to thereby provide an organo-silane coating on said asbestos material; and (iv) recovering the organo-silane coated chrysotile asbestos from the slurry.
Claim 7
Independent Claim
81 words
A method for coating chrysotile asbestos with an organo-silane which comprises: (i) providing an aqueous slurry of opened untreated chrysotile asbestos having an outer octahedral magnesia layer intact; (ii) treating the slurry with caustic reagent to the extent necessary to provide a pH in the range of about 10 to 12; (iii) adding organo-silane to the slurry of step (ii) to thereby provide an organo-silane coating on said asbestos material; and (iv) recovering the organo-silane coated chrysotile asbestos from the slurry.
Claim 8
Dependent Claim
27 words
An asbestos base material comprising opened chrysotile asbestos having an outer octahedral magnesia layer and an oleophilic organo-silane coating bonded thereto and overlying the asbestos base material.
Claim 9
Dependent Claim
27 words
An asbestos base material comprising opened chrysotile asbestos having an outer octahedral magnesia layer and an oleophilic organo-silane coating bonded thereto and overlying the asbestos base material.
Claim 10
Independent Claim
69 words
A method for producing oleophilic organo-silane coated asbestos base material which comprises: (i) providing opened untreated chrysotile asbestos material having an outer octahedral magnesia layer intact in an aqueous media at a pH of about 10 to 12; (ii) contacting said asbestos material with octyl triethoxy silane to provide an oleophilic organo-silane coating on said asbestos material; and (iii) recovering the organo-silane coated asbestos base material from the slurry.
Claim 11
Independent Claim
69 words
A method for producing oleophilic organo-silane coated asbestos base material which comprises: (i) providing opened untreated chrysotile asbestos material having an outer octahedral magnesia layer intact in an aqueous media at a pH of about 10 to 12; (ii) contacting said asbestos material with octyl triethoxy silane to provide an oleophilic organo-silane coating on said asbestos material; and (iii) recovering the organo-silane coated asbestos base material from the slurry.
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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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |