US4247658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treated polyester substrates
Assignee: Celanese Corp
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Filing: 1979-01-22
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Granted: 1981-01-27
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Expires: 1999-01-22
Abstract
Abstract A textile or textile-like polyester element having improved adhesion to rubber and being characterized by a high surface energy, a chemically unmodified surface and a coating which is a crystallizing agent for the polyester substrate.
Inventors
- 👤 Robert J. Arrowsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:40
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; D; D06; D06M; D06M15/00; D06M15/693; C08J2321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A saturated polyester filament having a porous layer on the surface thereof, said surface being chemically unmodified and exhibiting a surface energy greater than 45 dynes per centimeter and having a generally porous surface characterized in that said pores intersect with said surface and are predominantly less than about 200 Angstroms in major dimensions.
Claim 2
Dependent Claim
54 words
A saturated polyester filament having a porous layer on the surface thereof, said surface being chemically unmodified and exhibiting a surface energy greater than 45 dynes per centimeter and having a generally porous surface characterized in that said pores intersect with said surface and are predominantly less than about 200 Angstroms in major dimensions.
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |