Patent US3674724A successfully refreshed from Google Patents.
US3674724A
Expired / Lapsed
US
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Polyester reinforced elastomers
Assignee: Owens Corning
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Filing: 1970-04-27
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Granted: 1972-07-04
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Expires: 1990-04-27
Abstract
Abstract A new and improved polyester prepared by the reaction of a polycarboxylic acid, its acid halides or anhydrides, a polyol, and an organo silane, an amino silane or an organic titanate, and elastomeric products reinforced by fibers formed of same.
Inventors
- 👤 Alfred Marzocchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:04
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/046; C08G; C08G63/00; C08G63/68; C08J2321/00; Y; Y10; Y10S; Y10S156/00; Y10S156/91; Y10S525/00; Y10S525/935; Y10T; Y10T152/00; Y10T152/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
32 words
A polyester fiber-reinforced elastomer as defined in claim 1 wherein said polycarboxylic acid is an aliphatic or aromatic polycarboxylic acid having two to 25 carbon atoms and two to four carboxyl groups.
Claim 2
Dependent Claim
33 words
A polyester fiber-reinforced elastomer as defined in claim 1 wherein said polyol is selected from a group consisting of aliphatic polyols containing two to 10 carbon atOms and two to four hydroxy groups.
Claim 3
Dependent Claim
34 words
A polyester fiber-reinforced elastomer as defined in claim 1 wherein said polycarboxylic acid has the formula: wherein R1 is a divalent organic radical selected from the group consisting of alkylene, alkenylene, cycloalkylene and arylene.
Claim 4
Dependent Claim
24 words
A polyester fiber-reinforced elastomer as defined in claim 1 wherein said readily hydrolyzable group is selected from a group consisting of alkoxy and halogen.
Claim 5
Dependent Claim
63 words
A polyester fiber-reinforced elastomer as defined in claim 1 wherein the amino silane has the formula: Z(4-n) Si(-R2 - NH -(CH2 - CH2 - NH)x -H)n wherein Z is a readily hydrolyzable group, n is an integer from 1 to 3, x is an integer from 1 to 4 and R2 is selected from the group consisting of alkylene, alkenylene, phenylene and phenylalkylene.
Claim 6
Dependent Claim
30 words
A polyester fiber-reinforced elastomer as defined in claim 1 wherein the amino silane is added to said carboxyl material prior to the reaction of said acidic material with said polyol.
Claim 7
Dependent Claim
38 words
A polyester fiber-reinforced elastomer as defined in claim 7 wherein the amino silane is maintained in contact with said carboxylic material for a time up to 3 hours prior to reaction of said acidic material with said polyol.
Claim 8
Dependent Claim
25 words
A polyester fiber-reinforced elastomer as defined in claim 1 wherein said acidic material is reacted with said polyol at a temperature greater than 150* C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |