US3409431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectropolymerization
Assignee: GAF Corp
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Filing: 1966-03-14
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Granted: 1968-11-05
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Expires: 1986-03-14
Abstract
No abstract record available.
Inventors
- 👤 Albert S Deutsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:02
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/02; C; C08; C08F; C08F4/00; C08F4/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A PROCESS FOR THE PREPARATION OF A POSITIVE POLYMERIC RESIST IMAGE WHICH COMPRISES EXPOSING A PHOTOCONDUCTOR LAYER HAVING A HIGH DARK RESISTIVITY TO ELECTROMAGNETIC RADIATION HAVING A WAVE LENGTH EXTENDING FROM THE ULTRAVIOLET THROUGH THE VISIBLE REGION WHEREBY SAID PHOTOCONDUCTOR LAYER IS RENDERED CAPABLE OF CONDUCTING AN ELECTRIC CURRENT IN THE EXPOSED AREAS, SAID PHOTOCONDUCTOR LAYER BEING DISPOSED IN ELECTRICALLY CONDUCTING CONTACT WITH A VINYL MONOMER LAYER COATED ON AN ELECTRICALLY CONDUCTIVE SUPPORT, SAID MONOMER LAYER COMPRISING (A) A NORMALLY LIQUID TO NORMALLY SOLID VINYL MONOMER CONTAINING THE GROUPING CH2=C< ATTACHED DIRECTLY TO AN ELECTRONEGATIVE GROUPING AND (B) A REDUCING AGENT COMPRISING A METAL SALT IN WHICH THE METAL CATION IS CAPABLE OF OXIDATION TO A HIGHER VALENCE STATE WHEN CONTACTED WITH A PER COMPOUND CONTAINING THE GROUPING -O-O-, SAID OXIDATION BEING ACCOMPANIED BY THE EVOLUTION OF FREE RADICALS CAPABLE OF INITIATING THE POLYMERIZATION OF SAID VINYL MONOMER, AND WHEREIN AN ELECTRICAL POTENTIAL DIFFERENCE IS MAINTAINED ACROSS SAID PHOTOCONDUCTOR LAYER AND SAID CONDUCTIVE SUPPORT THROUGHOUT THE EXPOSURE INTERVAL, SAID POTENTIAL DIFFERENCE BEING SUBSTANIALLY UNI-
Claim 2
Dependent Claim
174 words
A PROCESS FOR THE PREPARATION OF A POSITIVE POLYMERIC RESIST IMAGE WHICH COMPRISES EXPOSING A PHOTOCONDUCTOR LAYER HAVING A HIGH DARK RESISTIVITY TO ELECTROMAGNETIC RADIATION HAVING A WAVE LENGTH EXTENDING FROM THE ULTRAVIOLET THROUGH THE VISIBLE REGION WHEREBY SAID PHOTOCONDUCTOR LAYER IS RENDERED CAPABLE OF CONDUCTING AN ELECTRIC CURRENT IN THE EXPOSED AREAS, SAID PHOTOCONDUCTOR LAYER BEING DISPOSED IN ELECTRICALLY CONDUCTING CONTACT WITH A VINYL MONOMER LAYER COATED ON AN ELECTRICALLY CONDUCTIVE SUPPORT, SAID MONOMER LAYER COMPRISING (A) A NORMALLY LIQUID TO NORMALLY SOLID VINYL MONOMER CONTAINING THE GROUPING CH2=C< ATTACHED DIRECTLY TO AN ELECTRONEGATIVE GROUPING AND (B) A REDUCING AGENT COMPRISING A METAL SALT IN WHICH THE METAL CATION IS CAPABLE OF OXIDATION TO A HIGHER VALENCE STATE WHEN CONTACTED WITH A PER COMPOUND CONTAINING THE GROUPING -O-O-, SAID OXIDATION BEING ACCOMPANIED BY THE EVOLUTION OF FREE RADICALS CAPABLE OF INITIATING THE POLYMERIZATION OF SAID VINYL MONOMER, AND WHEREIN AN ELECTRICAL POTENTIAL DIFFERENCE IS MAINTAINED ACROSS SAID PHOTOCONDUCTOR LAYER AND SAID CONDUCTIVE SUPPORT THROUGHOUT THE EXPOSURE INTERVAL, SAID POTENTIAL DIFFERENCE BEING SUBSTANIALLY UNI-
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |