Patent US3759027A successfully refreshed from Google Patents.
US3759027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruded asbestos yarn for paper dryer felts
Assignee: Johns Manville Corp
•
Filing: 1971-04-01
•
Granted: 1973-09-18
•
Expires: 1991-04-01
Abstract
Abstract A process, a fabric, and a use thereof, the process including preferably uniformly weaving interlocked asbestos fibers into the fabric porous to a gas suitable for use as a felt in an apparatus for carrying wet paper and for drying the paper by passing the gas through the porous felt.
Inventors
- 👤 I Barnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:12
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/02; D02G3/16; D02G3/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
14 words
The method of claim 1 wherein the gelable binder is a water soluble gum.
Claim 2
Dependent Claim
20 words
The method of claim 1 wherein the gelable binder comprises sodium alginate and the coagulated gel binder comprises calcium alginate.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the yarn is woven into a fabric.
Claim 4
Dependent Claim
18 words
The method of claim 1 wherein the yarn is woven into a porous fabric of substantially uniform porosity.
Claim 5
Dependent Claim
9 words
The porous fabric of the method of claim 5.
Claim 6
Dependent Claim
9 words
The yarn produced by the method of claim 1.
Claim 7
Independent Claim
122 words
A method of producing yarn comprising: a. dispersing asbestos fiber in a liquid medium containing a gelable binder; b. extruding the said dispersion of asbestos fiber and liquid medium containing gelable binder into a coagulating bath to align the asbestos fiber generally parallel to each other and gel the gelable binder; c. twisting into twisted strand form the extruded asbestos fiber and gel binder within which they are alIgned generally parallel to each other and also including therewith fiber selected from the group consisting of natural organic fibers and synthetic fiber during the twisting of the extruded asbestos fibers; and d. removing the gel binder while simultaneously maintaining the integrity of the formed strand of asbestos fibers and included fibers twisted therewith.
Claim 8
Dependent Claim
20 words
The method of claim 8 wherein the gelable binder comprises sodium algenate and the coagulated gel binder comprises calcium algenate.
Claim 9
Dependent Claim
32 words
The method of claim 8 wherein the yarn of twisted extruded asbestos fibers including fibers selected from the group consisting of natural organic fiber and synthetic fiber is woven into a fabric.
Claim 10
Dependent Claim
9 words
The yarn product of the method of claim 10.
Claim 11
Dependent Claim
36 words
The method of claim 8 wherein the yarn of twisted extruded asbestos fiber including fibers selected from the group consisting of organic fibers and synthetic fiber is woven into a porous fabric of substantially uniform porosity.
Claim 12
Dependent Claim
9 words
The porous fabric of the method of claim 12.
References Cited (Backward Citations)
GB352681A
Cited
US2995512A
Cited
US2914376A
Cited
US2972221A
Cited
US2955017A
Cited
US3328501A
Cited
US3338994A
Cited
US3407590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |