Patent US4206361A successfully refreshed from Google Patents.
Patent US2819164A successfully refreshed from Google Patents.
US2819164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing metallic patterns
Assignee: US Philips Corp
•
Filing: 1953-11-16
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Granted: 1958-01-07
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Expires: 1973-11-16
Abstract
No abstract record available.
Inventors
- 👤 Boersma Theo Tjalke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:53
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/04; G03F7/038
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD OF PRODUCING A PATTERN HAVING EXPOSED METAL SURFACES ADAPTED TO BE FURTHER MODIFIED COMPRISING THE STEPS OF APPLYING TO THE METAL SURFACE, A LAYER CONSISTING OF POLYVINYL BUTYRAL RESIN HAVING A DEGREE OF POLYMERIZATION AT WHICH A 10% SOLUTION IN ETHANOL HAS A VISCOSITY BETWEEN 200 AND 1000 CENTIPOISES AND A PHOTO-SENSITIVE BICHROMATE COMPOUND CAPABLE, UPON EXPOSURE TO ACTINIC LIGHT, OF FURTHER POLYMERIZING EXPOSED AREAS OF THE POLYVINYL BUTYRAL LAYER TO AN INSOLUBLE CONDITION, EXPOSING THE POLYVINYL BUTYRAL RESIN LAYER TO ACTINIC LIGHT TO INSOLUBILIZE THE EXPOSED PORTIONS THEREOF AND RENDER THE SAME HIGHLY ADHERENT TO THE UNDERLYING METAL SURFACE, AND WASHING OUT THE UNEXPOSED PORTIONS OF THE POLYVINYL BUTYRAL RESIN LAYER THEREBY LEAVING EXPOSED UNDERLYING PORTIONS OF THE METAL SURFACE.
Claim 2
Independent Claim
123 words
A METHOD OF PRODUCING A PATTERN HAVING EXPOSED METAL SURFACES ADAPTED TO BE FURTHER MODIFIED COMPRISING THE STEPS OF APPLYING TO THE METAL SURFACE, A LAYER CONSISTING OF POLYVINYL BUTYRAL RESIN HAVING A DEGREE OF POLYMERIZATION AT WHICH A 10% SOLUTION IN ETHANOL HAS A VISCOSITY BETWEEN 200 AND 1000 CENTIPOISES AND A PHOTO-SENSITIVE BICHROMATE COMPOUND CAPABLE, UPON EXPOSURE TO ACTINIC LIGHT, OF FURTHER POLYMERIZING EXPOSED AREAS OF THE POLYVINYL BUTYRAL LAYER TO AN INSOLUBLE CONDITION, EXPOSING THE POLYVINYL BUTYRAL RESIN LAYER TO ACTINIC LIGHT TO INSOLUBILIZE THE EXPOSED PORTIONS THEREOF AND RENDER THE SAME HIGHLY ADHERENT TO THE UNDERLYING METAL SURFACE, AND WASHING OUT THE UNEXPOSED PORTIONS OF THE POLYVINYL BUTYRAL RESIN LAYER THEREBY LEAVING EXPOSED UNDERLYING PORTIONS OF THE METAL SURFACE.
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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) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |