US4614629A
Expired / Lapsed
US
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Rotational compression process for forming liquid crystalline polymers with ultra-high mechanical properties
Assignee: International Business Machines Corp
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Filing: 1984-01-27
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Granted: 1986-09-30
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Expires: 2004-01-27
Abstract
Abstract A process for making a polymer with ultra-high mechanical properties by subjecting to compression and rotation in a contained geometry at a viscosity in the range of from 50 to 10 4 poise an aromatic liquid crystalline copolyester.
Inventors
- 👤 James Economy
- 👤 Anagnostis E. Zachariades
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:55
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/56; B29C45/5605; B29C67/00; B29C67/0003; B29C43/00; B29K; B29K2067/00; B29K2105/00; B29K2105/0079; B29K2105/0094
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
56 words
A process for forming a polymer of ultra-high mechanical properties, said process comprising the improvement of subjecting an aromatic liquid crystalline copolyester to a compressive force and a rotational force perpendicular to the compressive force in a contained geometry while the copolyester is within the range of from 50 to 10 4 poise in melt viscosity.
Claim 2
Dependent Claim
56 words
A process for forming a polymer of ultra-high mechanical properties, said process comprising the improvement of subjecting an aromatic liquid crystalline copolyester to a compressive force and a rotational force perpendicular to the compressive force in a contained geometry while the copolyester is within the range of from 50 to 10 4 poise in melt viscosity.
Claim 3
Dependent Claim
23 words
A process as claimed in claim 1 wherein the copolyester is formed into a shape with ultra-high tensile properties in the planar direction.
Claim 4
Dependent Claim
21 words
A process as claimed in claim 1 wherein the viscosity is in the range of from 100 to 10 4 poise.
Claim 5
Dependent Claim
19 words
A process as claimed in claim 1 wherein the copolyester is one formed from polyethylene terephthalate and p-hydroxybenzoic acid.
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) | 1989-09-29 | 1990-03-31 | 1990-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-29 | 1994-03-31 | 1994-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-29 | 1998-03-31 | 1998-09-30 | $7700.00 | Window Closed / Lapsed |