Patent US4681799A successfully refreshed from Google Patents.
US4681799A
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Ultrathin polymeric imine films and process for making the same
Assignee: Japan Science and Technology Agency
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Filing: 1985-10-17
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Granted: 1987-07-21
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Expires: 2005-10-17
Abstract
Abstract Novel ultrathin unit layers and built-up multilayers are obtained when a spreadable polyfunctional aldehyde or its precursor, particularly the alkyl Schiff base formed by its condensation with an alkyl amine, is spread on the surface of an aqueous subphase containing a diamine. The resulting polymeric imine unit layers were transferred and built up on subtrates which included quartz, aluminum and chrome-plated glass, and semiconductors.
Inventors
- 👤 Alan K. Engel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:34
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/68; H10P14/683; C; C08; C08G; C08G73/00; C08G73/02; C08G73/026; H10P14/63; H10P14/6326; H10P14/6342; H10P14/66; H10P14/668; H10P14/6344
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
57 words
An ultrathin film comprising a polymeric imine which comprises the repeat unit ═CHRCH═NR'N═ in which R is aromatic, heteroaromatic, olefinic, acetylenic, or a mixture of these, and R' is aromatic, heteroaromatic, olefinic, acetylenic, or a mixture of these, said film comprising at least one unit layer, each said unit layer having a thickness less than 20 nanometers.
Claim 2
Dependent Claim
57 words
An ultrathin film comprising a polymeric imine which comprises the repeat unit ═CHRCH═NR'N═ in which R is aromatic, heteroaromatic, olefinic, acetylenic, or a mixture of these, and R' is aromatic, heteroaromatic, olefinic, acetylenic, or a mixture of these, said film comprising at least one unit layer, each said unit layer having a thickness less than 20 nanometers.
Claim 3
Dependent Claim
23 words
An ultrathin film according to claim 1 comprising polymeric imines comprising the repeat unit ═CHRCH═NR'N═ wherein R is aromatic and R' is aromatic.
Claim 4
Dependent Claim
19 words
An ultrathin film according to claim 2 wherein R is selected from the group consisting of phenyl and naphthyl.
Claim 5
Dependent Claim
19 words
An ultrathin film according to claim 2 wherein R' is selected from the group consisting of phenyl and naphthyl.
Claim 6
Dependent Claim
16 words
An ultrathin film according to claim 2 wherein said polymeric imine comprises the repeat unit ##STR2##
Claim 7
Dependent Claim
16 words
An ultrathin film according to claim 2 wherein said polymeric imine comprises the repeat unit ##STR3##
Claim 8
Dependent Claim
16 words
An ultrathin film according to claim 2 wherein said polymeric imine comprises the repeat unit ##STR4##
Claim 9
Dependent Claim
131 words
An ultrathin film comprising a polymeric imine which comprises the repeat unit ═CHRCH═NR'N═ in which R is aromatic, heteroaromatic, olefinic, acetylenic, or a mixture of these, and R' is aromatic, heteroaromatic, olefinic, acetylenic, or a mixture of these, said film comprising at least one unit layer, each said unit layer having a thickness less than 20 nanometers, said film being prepared by the process comprising the steps of spreading an essentially monomeric polyfunctional aldehyde or precursor thereof on the surface of an aqueous solution containing an essentially monomeric polyfunctional amine, permitting said monomeric components to react to yield said polymeric imine film, and recovering the resulting polymeric imine film, said polyfunctional aldehyde or precursor thereof and said polyfunctional amine each comprising an aromatic, heteraromatic, olefinic, or acetylenic moiety or mixture thereof.
Claim 10
Dependent Claim
131 words
An ultrathin film comprising a polymeric imine which comprises the repeat unit ═CHRCH═NR'N═ in which R is aromatic, heteroaromatic, olefinic, acetylenic, or a mixture of these, and R' is aromatic, heteroaromatic, olefinic, acetylenic, or a mixture of these, said film comprising at least one unit layer, each said unit layer having a thickness less than 20 nanometers, said film being prepared by the process comprising the steps of spreading an essentially monomeric polyfunctional aldehyde or precursor thereof on the surface of an aqueous solution containing an essentially monomeric polyfunctional amine, permitting said monomeric components to react to yield said polymeric imine film, and recovering the resulting polymeric imine film, said polyfunctional aldehyde or precursor thereof and said polyfunctional amine each comprising an aromatic, heteraromatic, olefinic, or acetylenic moiety or mixture thereof.
Claim 11
Dependent Claim
35 words
An ultrathin film according to claim 8 wherein said essentially monomeric polyfunctional aldehyde or precursor thereof is spread on the surface of said aqueous solution in the form of a solution thereof in a solvent.
Claim 12
Dependent Claim
30 words
An ultrathin film according to claim 9 wherein said solvent is selected from the group consisting of chloroform, toluene, benzene, dichloroethane and mixtures of hexane or heptane with diethyl ether.
Claim 13
Dependent Claim
33 words
An ultrathin film according to claim 9 wherein the concentration of said essentially monomeric polyfunctional aldehyde or precursor thereof in said solvent is in the range of from 0.001 to 0.1 wt. %.
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) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |