US2969731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unexposed area
Assignee: —
•
Filing: 1954-05-24
•
Granted: 1961-01-31
•
Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:17
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/12; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/113
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE METHOD OF PRODUCING A WEAR-RESISTANT STENCIL WHICH COMPRISES UNIFORMLY COATING A THIN FLEXIBLE SHEET OF PERMEABLE MATERIAL WITH A FILM OF A CINNAMIC ACID ESTER RESIN SENSITIZED TO THE ACTION OF LIGHT SUPERIMPOSING AN ARTICLE HAVING OPAQUE AND TRANSPARENT AREAS, EXPOSING SUCH COATED SHEET TO THE ACTION OF LIGHT TRANSMITTED THROUGH SUCH ARTICLE TO RENDER THE EXPOSED PORTIONS INSOLUBLE IN DEVELOPER, WASHING SUCH EXPOSED FILM IN SOLVENT DEVELOPER EFFECTIVE TO DISSOLVE OUT THE UNEXPOSED PORTIONS AND DISCLOSE THE UNDERLYING PERMEABLE SHEET TO PRODUCE THE STENCIL DESIGN, SUCH DEVELOPER CONTAINING A PLASTICIZING AGENT FOR SUCH CINNAMIC ACID ESTER RESIN ADAPTED TO BE ABSORBED THEREBY DURING SUCH WASHING OPERATION TO RENDER SUCH RESIN COATING FLEXIBLE AND NON-BRITTLE.
Claim 2
Independent Claim
116 words
THE METHOD OF PRODUCING A WEAR-RESISTANT STENCIL WHICH COMPRISES UNIFORMLY COATING A THIN FLEXIBLE SHEET OF PERMEABLE MATERIAL WITH A FILM OF A CINNAMIC ACID ESTER RESIN SENSITIZED TO THE ACTION OF LIGHT SUPERIMPOSING AN ARTICLE HAVING OPAQUE AND TRANSPARENT AREAS, EXPOSING SUCH COATED SHEET TO THE ACTION OF LIGHT TRANSMITTED THROUGH SUCH ARTICLE TO RENDER THE EXPOSED PORTIONS INSOLUBLE IN DEVELOPER, WASHING SUCH EXPOSED FILM IN SOLVENT DEVELOPER EFFECTIVE TO DISSOLVE OUT THE UNEXPOSED PORTIONS AND DISCLOSE THE UNDERLYING PERMEABLE SHEET TO PRODUCE THE STENCIL DESIGN, SUCH DEVELOPER CONTAINING A PLASTICIZING AGENT FOR SUCH CINNAMIC ACID ESTER RESIN ADAPTED TO BE ABSORBED THEREBY DURING SUCH WASHING OPERATION TO RENDER SUCH RESIN COATING FLEXIBLE AND NON-BRITTLE.
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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) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |