Patent US4502364A successfully refreshed from Google Patents.
US4502364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite fibrous packing material containing fibers of aromatic sulfide polymers
Assignee: RM Engineered Products Inc
•
Filing: 1983-09-22
•
Granted: 1985-03-05
•
Expires: 2003-09-22
Abstract
Abstract A packing material of braided yarns is provided wherein the yarns have a glass and/or acrylic core and an outer layer of polyphenylene sulfide fibers, either alone or in combination with other unreactive fibers such as aramid, carbon or graphite fibers.
Inventors
- 👤 Jerry Zucker
- 👤 John W. Hawkins
- 👤 John J. O'Brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:58
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/20; F16J15/22; D; D02; D02G; D02G3/00; D02G3/02; D02G3/16; D02G3/18; D02G3/182; D02G3/185; D02G3/22; D02G3/38; D02G3/44; D02G3/447; D04; D04C; D04C1/00; D04C1/06; D04C1/12; D10; D10B; D10B2505/00; D10B2505/06; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2931; Y10T428/2933; Y10T428/2964; Y10T428/2967
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A packing comprising a plurality of braided yarns, said yarns comprising an inner core and an outer layer protecting the inner core, said core comprising fibers selected from the group consisting of fibers of glass, acrylic and mixtures thereof, said outer layer comprising polyphenylene sulfide, wherein the amount of polyphenylene sulfide in said packing is at least 15 percent by weight and wherein the core comprises from about 10 to about 60 percent by weight of the yarns.
Claim 2
Dependent Claim
78 words
A packing comprising a plurality of braided yarns, said yarns comprising an inner core and an outer layer protecting the inner core, said core comprising fibers selected from the group consisting of fibers of glass, acrylic and mixtures thereof, said outer layer comprising polyphenylene sulfide, wherein the amount of polyphenylene sulfide in said packing is at least 15 percent by weight and wherein the core comprises from about 10 to about 60 percent by weight of the yarns.
Claim 3
Dependent Claim
21 words
The packing according to claim 1 wherein said outer layer comprises polyphenylene sulfide fibers blended in intimate combination with carbon fibers.
Claim 4
Dependent Claim
21 words
The packing according to claim 1 wherein said outer layer comprises polyphenylene sulfide fibers blended in intimate combination with aramid fibers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |