Patent US3650879A successfully refreshed from Google Patents.
US3650879A
Expired / Lapsed
US
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Manufacture of unique polyethylene terephthalate fiber
Assignee: Akzona Inc
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Filing: 1969-08-25
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Granted: 1972-03-21
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Expires: 1989-08-25
Abstract
Abstract A fiber especially suitable for reinforcing bitumen-containing materials which comprises a fiber of polyethylene terephthalate having a tenacity of at least about 7.5 grams per denier, an elongation at break of at least about 9 percent, an elongation of not more than about 5 percent under a load of 5 grams per denier and a shrinkage of less than 4 percent when kept under a tension of 0.05 grams per denier for 4 minutes at about 160* C. Also a process for producing this fiber and a bitumen-containing structure reinforced therewith are disclosed.
Inventors
- 👤 Johannes Pieter Munting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:06
CPC Classifications
D; D06; D06N; D06N5/00; D01; D01F; D01F6/00; D01F6/58; D01F6/62; D02; D02G; D02G3/00; D02G3/44; D02G3/447; D10; D10B; D10B2331/00; D10B2331/04; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2738
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
76 words
The fiber reinforced bitumen-containing material of claim 9 in which said fiber has a tenacity in a range of from about 7.5 to 9.5 grams per denier, an elongation at break of from about 9 to 15 percent, an elongation of about 2 to 5 percent at a load of 5 grams per denier, and a shrinkage of from about 1 to 4 percent when being heated for 4 minutes at 160* C. under said tension.
Claim 2
Dependent Claim
32 words
The fiber reinforced bitumen-containing material of claim 1 in which the polyethylene terephthalate from which said fiber is made has a relative viscosity in the range of from about 1.5 to 1.70.
Claim 3
Dependent Claim
24 words
The fiber reinforced bitumen-containing material of claim 1 in which said fiber is in the form of a fabric woven from continuous multi-filament yarn.
Claim 4
Dependent Claim
19 words
The fiber reinforced bitumen-containing material of claim 1 in which said fiber is adhesively bonded to said bitumen-containing layer.
Claim 5
Dependent Claim
19 words
The fiber reinforced bitumen-containing material of claim 1 in which said fiber is laminated between two bitumen containing layers.
Claim 6
Dependent Claim
46 words
The fiber reinforced bitumen-containing material of claim 1 in which said fiber is coated with an adhesive promoting substance comprising a resinous material that has a softening point between 50* and 160* C., is miscible with bitumen, and acts as a wetting agent for the fiber.
Claim 7
Dependent Claim
35 words
The fiber reinforced bitumen-containing material of claim 7 in which said resinous material is selected from the group consisting of montan resin, tall resin, coumarone and indene resins, maleic resins, phenol resins, and rosin derivatives.
References Cited (Backward Citations)
US3457136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |