US2969732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
-permeable support
Assignee: —
•
Filing: 1955-05-11
•
Granted: 1961-01-31
•
Expires: 1975-05-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:24
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: 4
Claim 1
Independent Claim
158 words
THE METHOD OF PRODUCING A WEAR-RESISTANT STENCIL WHICH COMPRISES APPLYING A VERY THIN COATING OF A CINNAMIC ACID ESTER RESIN SENSITIZED TO THE ACTION OF LIGHT TO A THIN FLEXIBLE SHEET OF POROUS MATERIAL, SUCH COATING LEAVING THE PORES IN SUCH SHEET OPEN, EXPOSING SUCH COATED SHEET TO THE DACTION OF LIGHT TO RENDER SUCH COATING INSOLUBLE, THEN COATING SUCH PRE-COATED SHEET WITH A FILM OF A CINNAMIC ACID ESTER RESIN SENSITIZED TO THE ACTION OF LIGHT AND EFFECTIVE TO CLOSE SUCH PORES IN SUCH SHEET, DRYING SUCH FILM TO LEAVE A RESIDUAL COATING HAVING A THICKNESS OF FROM .0015 TO .008 INCH, 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, AND WASHING SUCH EXPOSED FILM IN SOLVENT DEVELOPER TO DISSOLVE OUT THE UNEXPOSED PORTIONS AND DISCLOSE THE UNDERLYING REINFORCED PERMEABLE SHEET TO PRODUCE THE STENCIL DESIGN.
Claim 2
Independent Claim
158 words
THE METHOD OF PRODUCING A WEAR-RESISTANT STENCIL WHICH COMPRISES APPLYING A VERY THIN COATING OF A CINNAMIC ACID ESTER RESIN SENSITIZED TO THE ACTION OF LIGHT TO A THIN FLEXIBLE SHEET OF POROUS MATERIAL, SUCH COATING LEAVING THE PORES IN SUCH SHEET OPEN, EXPOSING SUCH COATED SHEET TO THE DACTION OF LIGHT TO RENDER SUCH COATING INSOLUBLE, THEN COATING SUCH PRE-COATED SHEET WITH A FILM OF A CINNAMIC ACID ESTER RESIN SENSITIZED TO THE ACTION OF LIGHT AND EFFECTIVE TO CLOSE SUCH PORES IN SUCH SHEET, DRYING SUCH FILM TO LEAVE A RESIDUAL COATING HAVING A THICKNESS OF FROM .0015 TO .008 INCH, 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, AND WASHING SUCH EXPOSED FILM IN SOLVENT DEVELOPER TO DISSOLVE OUT THE UNEXPOSED PORTIONS AND DISCLOSE THE UNDERLYING REINFORCED PERMEABLE SHEET TO PRODUCE THE STENCIL DESIGN.
Claim 3
Dependent Claim
75 words
A STENCIL COMPRISING A SHEET OF POROUS MATERIAL PERMEABLE TO AN ELECTROLYTIC FLUID, LIGHT-EXPOSED DECOMPOSITION PRODUCTS OF A LIGHT-SENSITIZED CINNAMIC ACID ESTER RESIN COATING THE POROUS MATERIAL WITHOUT CLOSING PORES THEREIN TO STRENGTHEN AND REINFORCE SAID MATERIAL, AND A FURTHER COATING OF THE LIGHT-SENSITIVE CINNAMIC ACID ESTER RESIN OVERLYING AND ADHERED TO SAID SHEET TO CLOSE THE PORES THEREOF, SAID LAST MENTIONED RESIN BEING REACTIVE TO LIGHT TO FORM HARDENED NON-DESIGN AREAS OF THE STENCIL.
Claim 4
Dependent Claim
75 words
A STENCIL COMPRISING A SHEET OF POROUS MATERIAL PERMEABLE TO AN ELECTROLYTIC FLUID, LIGHT-EXPOSED DECOMPOSITION PRODUCTS OF A LIGHT-SENSITIZED CINNAMIC ACID ESTER RESIN COATING THE POROUS MATERIAL WITHOUT CLOSING PORES THEREIN TO STRENGTHEN AND REINFORCE SAID MATERIAL, AND A FURTHER COATING OF THE LIGHT-SENSITIVE CINNAMIC ACID ESTER RESIN OVERLYING AND ADHERED TO SAID SHEET TO CLOSE THE PORES THEREOF, SAID LAST MENTIONED RESIN BEING REACTIVE TO LIGHT TO FORM HARDENED NON-DESIGN AREAS OF THE STENCIL.
References Cited (Backward Citations)
US1371157A
Cited
US1830980A
Cited
US2131225A
Cited
US2064764A
Cited
US2184288A
Cited
US2335021A
Cited
US2370874A
Cited
US2405508A
Cited
US2500877A
Cited
US2557352A
Cited
GB633293A
Cited
US2610120A
Cited
US2693426A
Cited
US2732301A
Cited
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 |