US3608033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of molding compositions containing high weight percentage of glass
Assignee: Zeneca Inc
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Filing: 1969-06-17
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Granted: 1971-09-21
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Expires: 1989-06-17
Abstract
Abstract Process for production of molding compositions containing high weight percentage of glass comprising feeding an extruded mixture of glass fibers and molten thermoplastic resin to a crosshead die, coating continuous glass roving with said mixture in said crosshead die, solidifying said molten thermoplastic while said thermoplastic is coated on said roving, and pelletizing the same into pellets containing between about 61 to 90 weight percent glass. The molding composition is in the form of such pellets which generally comprise right cylinders having a diameter of between three thirty-seconds and one-fourth inch and a height of between one-eighth to one-half inch.
Inventors
- 👤 Norman T Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:36
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; B; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B29B9/12; B29B9/14; B29C; B29C48/00; B29C48/15; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C48/03; B29C48/04; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1084; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A process in accordance with claim 1 wherein the pelletizing step involves chopping the coated roving to yield right cylinders having a diameter of three thirty-seconds inch to one-fourth inch and a height of one-eighth inch to one-half inch.
Claim 2
Dependent Claim
23 words
A process is accordance with claim 2 in which the extruded mixture is coated onto the continuous glass roving in a crosshead die.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |