US4287020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparation of an asbestos product
Assignee: Individual
•
Filing: 1979-11-29
•
Granted: 1981-09-01
•
Expires: 1999-11-29
Abstract
Abstract A flexible mat of randomly-oriented, interwoven chyrsotile asbestos fibers, having the appearance of a flake when flattened and spread out to "open" the fibers without separating the individual fibers and without significantly reducing their natural length, have been found to provide a reinforcing agent of extraordinary strength.
Inventors
- 👤 Irving F. Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:54
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B20/00; C04B20/02; C04B20/08; C04B26/00; C04B26/02; C04B26/04; C04B26/045; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998; Y10T428/31504; Y10T428/31652; Y10T442/00; Y10T442/20; Y10T442/2926
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
76 words
A method for producing an asbestos product of increased strength comprising subjecting asbestos ore flakes comprised of a flexible mat of randomly oriented and interwoven chrysotile asbestos fibers to a flattening and spreading out operation for a time sufficient to flatten and spread out said flakes so as to open said fibers but for a time insufficient to effect separation of said flakes into individual asbestos fibers and reduction in the natural length of said fibers.
Claim 2
Independent Claim
76 words
A method for producing an asbestos product of increased strength comprising subjecting asbestos ore flakes comprised of a flexible mat of randomly oriented and interwoven chrysotile asbestos fibers to a flattening and spreading out operation for a time sufficient to flatten and spread out said flakes so as to open said fibers but for a time insufficient to effect separation of said flakes into individual asbestos fibers and reduction in the natural length of said fibers.
Claim 3
Dependent Claim
16 words
A method according to claim 1 wherein the flattening and spreading out operation is a milling.
Claim 4
Dependent Claim
16 words
A method according to claim 2 wherein the milling is carried out in a rod mill.
Claim 5
Dependent Claim
13 words
A method according to claim 3 wherein the milling is dry rod milling.
Claim 6
Dependent Claim
13 words
A method according to claim 3 wherein the milling is wet rod milling.
Claim 7
Dependent Claim
24 words
A method according to claim 2 wherein the milling is carried out in a Waring Blender, hydropulper or a machine with similar mechanical action.
Claim 8
Dependent Claim
46 words
A method according to claim 2 wherein the milling is carried out by first subjecting said flakes to the action of a fiberizer to semi-open the flakes and then completing the opening of the flakes by subjecting the semi-opened flakes to wet or dry rod milling.
Claim 9
Dependent Claim
51 words
An asbestos product comprising a flexible mat of randomly oriented and interwoven chrysotile asbestos fibers having the appearance of a flake, said flake being flattened and spread out to open said fibers without separation of the flake into individual fibers and without significant reduction in the natural length of the fibers.
Claim 10
Dependent Claim
51 words
An asbestos product comprising a flexible mat of randomly oriented and interwoven chrysotile asbestos fibers having the appearance of a flake, said flake being flattened and spread out to open said fibers without separation of the flake into individual fibers and without significant reduction in the natural length of the fibers.
Claim 11
Dependent Claim
31 words
An asbestos product according to claim 8 having a modulus of rupture (MR A ), when tested as a reinforcing agent in Portland cement, in excess of 270 kg/cm 2 .
Claim 12
Dependent Claim
31 words
An asbestos product according to claim 8 having a modulus of rupture (MR A ), when tested as a reinforcing agent in Portland cement, in excess of 350 kg/cm 2 .
Claim 13
Dependent Claim
33 words
A composition of matter comprising a binder selected from the group consisting of cement and a normally solid synthetic plastic material having incorporated therein reinforcing amounts of the asbestos product of claim 8.
Claim 14
Dependent Claim
13 words
A composition of matter according to claim 11 wherein the binder is cement.
Claim 15
Dependent Claim
22 words
An article of manufacture according to claim 12 wherein the amount of said asbestos product is about 5 to 25% by weight.
Claim 16
Dependent Claim
17 words
An article of manufacture according to claim 11 wherein the binder is a normally solid plastic material.
Claim 17
Dependent Claim
14 words
An article of manufacture according to claim 14 wherein the plastic material is polypropylene.
Claim 18
Dependent Claim
14 words
An article of manufacture according to claim 12 wherein the cement is Portland cement.
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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) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |