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US3964906A
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Method of forming a hydrophobic surface by exposing a colloidal sol to UV radiation
Assignee: AT&T Inc
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Filing: 1975-09-26
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Granted: 1976-06-22
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Expires: 1995-09-26
Abstract
Abstract A method of forming a hydrophobic surface is disclosed. The method comprises coating a substrate surface with a stable aqueous colloidal solution, formed by a controlled hydrolysis and nucleation reaction, comprising insoluble hydrous oxide particles of an element selected from Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof. The coated surface is then exposed to a source of ultraviolet radiation having a wavelength ranging from 1800A to 3300A to render exposed surface regions hydrophobic. This is a division of application Ser. No. 424,015, filed Dec. 12, 1973, now U.S. Pat. No. 3,949,121.
Inventors
- 👤 John Thomas Kenney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:35
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/0042; G03F7/0043; G03C; G03C1/00; G03C1/705; H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/182; H05K3/185
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A method of forming a hydrophobic surface pattern on a surface, which comprises: coating the surface with a stable aqueous colloidal wetting sol, formed by a hydrolysis and nucleation reaction, comprising insoluble hydrous oxide particles of an element selected from the group consisting of Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof, to form a coated surface of hydrophilic character; and selectively exposing said coated surface to a source of ultraviolet radiation having a wavelength ranging from 1800A to 3300A to render exposed portions hydrophobic to form the hydrophobic surface pattern.
Claim 2
Independent Claim
96 words
A method of forming a hydrophobic surface pattern on a surface, which comprises: coating the surface with a stable aqueous colloidal wetting sol, formed by a hydrolysis and nucleation reaction, comprising insoluble hydrous oxide particles of an element selected from the group consisting of Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof, to form a coated surface of hydrophilic character; and selectively exposing said coated surface to a source of ultraviolet radiation having a wavelength ranging from 1800A to 3300A to render exposed portions hydrophobic to form the hydrophobic surface pattern.
Claim 3
Independent Claim
107 words
A method of preparing a printing master, which comprises: a. coating a surface with a stable aqueous colloidal wetting sol, formed by a hydrolysis and nucleation reaction, comprising insoluble hydrous oxide particles of an element selected from the group consisting of Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof to form a coated surface of hydrophilic character, to form a coated surface of hydrophilic character; and b. selectively exposing portions of said coated, hydrophilic surface to a source of ultraviolet radiation having a wavelength ranging from 1800A to 3300A to render regions thereof hydrophobic and to delineate an ink retaining surface pattern.
Claim 4
Independent Claim
107 words
A method of preparing a printing master, which comprises: a. coating a surface with a stable aqueous colloidal wetting sol, formed by a hydrolysis and nucleation reaction, comprising insoluble hydrous oxide particles of an element selected from the group consisting of Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof to form a coated surface of hydrophilic character, to form a coated surface of hydrophilic character; and b. selectively exposing portions of said coated, hydrophilic surface to a source of ultraviolet radiation having a wavelength ranging from 1800A to 3300A to render regions thereof hydrophobic and to delineate an ink retaining surface pattern.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |