Patent US5207862A successfully refreshed from Google Patents.
US5207862A
Expired / Lapsed
US
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Technique for epitaxial growth of oriented thin films of polydiacetylenes
Assignee: Nytell Software LLC
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Filing: 1989-09-08
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Granted: 1993-05-04
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Expires: 2009-09-08
Abstract
Abstract A technique for the preparation of an oriented thin film polydiacetylene suitable for use in channel waveguides involves depositing an alignment polymer upon a substrate, rubbing the surface thereof to effect orientation, depositing the polydiacetylene thereon and heating to a temperature just below the melting point thereof.
Inventors
- 👤 Gregory L. Baker
- 👤 Sin-Doo Lee
- 👤 Jayantilal S. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:21
CPC Classifications
C; C30; C30B; C30B7/00; C30B29/00; C30B29/54; C30B29/58; C30B33/00; Y; Y10; Y10S; Y10S117/00; Y10S117/918; Y10S117/919
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
Method for the preparation of an oriented thin film polydiacetylene upon a substrate which comprises the steps of: (a) depositing a thin film of an alignment layer upon said substrate, (b) rubbing the surface of the alignment layer with a cloth, thereby inducing orientation therein, (c) depositing a soluble film of a polydiacetylene upon the oriented alignment layer, (d) heating the resultant assembly to a temperature above the glass transition temperature but just below the melting point of the polydiacetylene, and (e) cooling the assembly to room temperature.
Claim 2
Dependent Claim
88 words
Method for the preparation of an oriented thin film polydiacetylene upon a substrate which comprises the steps of: (a) depositing a thin film of an alignment layer upon said substrate, (b) rubbing the surface of the alignment layer with a cloth, thereby inducing orientation therein, (c) depositing a soluble film of a polydiacetylene upon the oriented alignment layer, (d) heating the resultant assembly to a temperature above the glass transition temperature but just below the melting point of the polydiacetylene, and (e) cooling the assembly to room temperature.
Claim 3
Dependent Claim
35 words
Method in accordance with claim 1 wherein the alignment layer is selected from the group consisting of polyester, polyamides and polyethylenes which when elongated retain a percentage of elongation (at break) greater than 100 percent.
Claim 4
Dependent Claim
46 words
Method in accordance with claim 1 wherein the polydiacetylene is of the general formula ═[C(R)-C.tbd.C-C(R')]═ wherein R and R' represent C 1 -C 50 aliphatic groups, aromatic groups or combinations thereof with or without heteroatoms and wherein R and R' may be the same or different.
Claim 5
Dependent Claim
20 words
Method in accordance with claim 1 wherein the alignment layer is deposited in a thickness of at lest 100 Å.
Claim 6
Dependent Claim
11 words
Method in accordance with claim 1 wherein said substrate is glass.
Claim 7
Dependent Claim
12 words
Method in accordance with claim 1 wherein said polydiacetylene is poly(4 BCMU).
Claim 8
Dependent Claim
12 words
Method in accordance with claim 1 wherein said rubbing is area selective.
Claim 9
Dependent Claim
14 words
Method in accordance with claim 6 wherein said alignment layer is poly(1,4 butylene terephthalate).
Claim 10
Dependent Claim
13 words
Channel waveguide including an oriented thin film polydiacetylene deposited upon an alignment polymer.
Claim 11
Dependent Claim
13 words
Channel waveguide including an oriented thin film polydiacetylene deposited upon an alignment polymer.
Claim 12
Dependent Claim
20 words
Waveguide in accordance with claim 8 wherein said polydiacetylene is poly(4 BCMU) and said alignment polymer is poly(1,4 butylene terephthalate).
References Cited (Backward Citations)
US3839067A
Cited
US4238352A
Cited
US4431263A
Cited
US4561726A
Cited
US4531809A
Cited
US4789622A
Cited
JPS60208707A
Cited
US4743659A
Cited
US4808285A
Cited
US4787714A
Cited
US4767169A
Cited
US4863763A
Cited
US4824522A
Cited
US4834480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |