US4309472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slats serving as protection against light
Assignee: Hoechst AG
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Filing: 1980-05-28
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Granted: 1982-01-05
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Expires: 2000-05-28
Abstract
Abstract Slats made from linear synthetic polyester fibers, which serve as protection against light, characterized in that they consist of shrunk flat textile structures that have been stiffened permanently by plastification.
Inventors
- 👤 Joachim Gotting
- 👤 Heiner Zimmermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:59
CPC Classifications
D; D03; D03D; D03D3/00; D03D15/00; D03D15/50; D03D15/513; E; E06; E06B; E06B9/00; E06B9/24; E06B9/26; E06B9/38; E06B9/386; Y; Y10; Y10S; Y10S160/00; Y10S160/90; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/2861
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
80 words
Slat means for protecting against light comprising a textile slat made from linear synthetic polyester fibers, said slat being stiffened permanently by heat shrinkage and containing a flame-retarding agent which consists of said polyester containing chain members having structural units of the formula ##STR2## in which R is saturated, open-chain or cyclic alkylene, arylene or aralkylene and R 1 is alkyl with up to 6 carbon atoms, aryl or aralkyl, that have been incorporated into the polyester chains by condensation.
Claim 2
Dependent Claim
80 words
Slat means for protecting against light comprising a textile slat made from linear synthetic polyester fibers, said slat being stiffened permanently by heat shrinkage and containing a flame-retarding agent which consists of said polyester containing chain members having structural units of the formula ##STR2## in which R is saturated, open-chain or cyclic alkylene, arylene or aralkylene and R 1 is alkyl with up to 6 carbon atoms, aryl or aralkyl, that have been incorporated into the polyester chains by condensation.
Claim 3
Dependent Claim
16 words
The slat means as claimed in claim 1, characterized in that the fibers consist of copolyesters.
Claim 4
Dependent Claim
18 words
The slat means claimed in claim 1 wherein the fibers are polyethylene terephthalate, polybutylene terephthalate or copolyesters thereof.
Claim 5
Dependent Claim
17 words
The slat means as claimed in claim 1 wherein the fibers contain isophthalic acid or trimethylene glycol.
Claim 6
Dependent Claim
35 words
The slat means as claimed in claim 1, 3 or 4 wherein the flame retarding agent is contained in an amount of from 0.1 to 20 weight %, based on the weight of the slat.
Claim 7
Dependent Claim
32 words
The slat means as claimed in claim 5 wherein the flame retarding agent is contained in an amount of from 2.5 to 12 weight %, based on the weight of the slat.
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) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |