US4842754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compatible blends of main chain and side chain thermotropic liquid crystal polymers
Assignee: SC Johnson and Son Inc
•
Filing: 1987-10-22
•
Granted: 1989-06-27
•
Expires: 2007-10-22
Abstract
Abstract This invention relates to compatible blends of liquid crystal main chain polymers and liquid crystal side chain polymers having the same or similar mesogenic groups.
Inventors
- 👤 Hassan A. Hakemi
- 👤 Husam A. A. Rasoul
- 👤 Robert W. Stackman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:51
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C08; C08L; C08L33/00; C08L33/04; C08L33/14; C08L67/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
34 words
A compatible blend of thermotropic liquid crystal polymers comprising: (i) a main chain liquid crystal polymer having repeating units of ##STR29## and (ii) a side chain liquid crystal polymer having repeating units of ##STR30##
Claim 2
Dependent Claim
34 words
A compatible blend of thermotropic liquid crystal polymers comprising: (i) a main chain liquid crystal polymer having repeating units of ##STR29## and (ii) a side chain liquid crystal polymer having repeating units of ##STR30##
Claim 3
Dependent Claim
11 words
The blend of claim 1 wherein n is 6 or 8.
Claim 4
Dependent Claim
20 words
The blend of claim 1 wherein the main chain polymer is present in an amount of about 10-95 weight percent.
Claim 5
Dependent Claim
20 words
The blend of claim 1 wherein the side chain polymer is present in an amount of about 50-90 weight percent.
References Cited (Backward Citations)
US4293435A
Cited
US4631328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |