US4344992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing organo-silane coated asbestos base material
Assignee: KCAC Inc
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Filing: 1981-06-30
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Granted: 1982-08-17
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Expires: 2001-06-30
Abstract
Abstract A chrysotile asbestos base material is mixed in water containing dissolved alum (aluminum sulphate) prior to addition of the organo-silane coating.
Inventors
- 👤 Sundaresan Ramachandran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:01
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/01; C; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/032; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/2962
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
59 words
A process for producing organo-silane coated asbestos base material which comprises: (i) contacting an open chrysotile asbestos with a soluable di or trivalent metallic salt in an aqueous medium, (ii) adding organo-silane to said aqueous medium to thereby provide an organo-silane coating on said asbestos material, and (iii) recovering the organo-silane coated asbestos base material from said aqueous medium.
Claim 2
Dependent Claim
59 words
A process for producing organo-silane coated asbestos base material which comprises: (i) contacting an open chrysotile asbestos with a soluable di or trivalent metallic salt in an aqueous medium, (ii) adding organo-silane to said aqueous medium to thereby provide an organo-silane coating on said asbestos material, and (iii) recovering the organo-silane coated asbestos base material from said aqueous medium.
Claim 3
Dependent Claim
31 words
A process according to claim 1 wherein said soluble di or trivalent metallic salt is selected from the group consisting of alum, iron sulphate, potassium ammonium sulfate and ferrous annonium sulphate.
References Cited (Backward Citations)
DE2546061A1
Cited
US4183814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |