US3864155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass fiber size and resulting product
Assignee: PPG Industries Inc
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Filing: 1973-04-27
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Granted: 1975-02-04
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Expires: 1993-04-27
Abstract
Abstract A method of producing an improved sized glass fiber chopped strand suitable for the manufacture of articles formed from aqueous dispersion is shown wherein glass fiber filaments are treated with an aqueous sizing solution comprising gelatin, an nalkyl N-amido-alkyl imidazoline and a fatty acid amide.
Inventors
- 👤 Roy R Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:45
CPC Classifications
D; D21; D21H; D21H23/00; D21H23/02; D21H23/04; D21H23/06; D21H23/08; D21H23/10; C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/255; D21H13/00; D21H13/36; D21H13/38; D21H13/40; D21H17/00; D21H17/03; D21H17/05; D21H17/07; D21H17/20; D21H17/21; D21H17/22; D21H17/71; D21H5/00; D21H5/12; D21H5/1254; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/31504; Y10T428/31551; Y10T428/31623; Y10T428/31725; Y10T428/31765; Y10T428/31768
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
19 words
The method of claim 1 wherein the solids of said sizing composition comprise 74 percent by weight of gelatin.
Claim 2
Dependent Claim
22 words
The method of claim 1 wherein the solids of said sizing composition comprise 22 percent by weight of an n-alkyl N-amidoalkyl imidazoline.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the solids of said sizing composition comprise 4 percent by weight of a solubilized fatty acid amide.
Claim 4
Dependent Claim
67 words
Chopped glass fiber strand for use as reinforcement for articles formed from aqueous dispersions, having a coating thereon, constituting 0.2 percent to 3 percent of said glass fibers, said coating solids comprising 40 percent to 93 percent by weight of gelatin, 5.55 percent to 44.6 percent by weight of an n-alkyl N-amidoalkyl imidazoline and 0.95 percent to 16.7 percent by weight of a solubilized fatty acid amide.
Claim 5
Dependent Claim
18 words
Chopped glass fibers of claim 5 wherein the gelatin comprises 74 percent by weight of the coating composition.
Claim 6
Dependent Claim
20 words
Chopped glass fibers of claim 5 wherein the n-alkyl N-amidoalkyl imidazoline comprises 22 percent by weight of the coating composition.
Claim 7
Dependent Claim
21 words
Chopped glass fibers fo claim 5 wherein the solubilized fatty acid amide comprises 4 percent by weight of the coating composition.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |