US3145654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing plates
Assignee: Printing Plates Res Inc
•
Filing: 1957-04-08
•
Granted: 1964-08-25
•
Expires: 1977-04-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Stephen W Johnson
- 👤 Charles G Harford
- 👤 Gordon W Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:41
CPC Classifications
B; B41; B41C; B41C3/00; B41C3/08; Y; Y10; Y10S; Y10S425/00; Y10S425/029
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
THE METHOD OF FORMING A PLASTIC BACKED ELECTROTYPE WHICH COMPRISES: MAKING A VINYL RESIN IMPRESSION OF AN ORIGINAL TYPE FORM; SEPARATING SAID VINYL IMPRESSION FROM SAID ORIGINAL TYPE FORM, THEREBY PRODUCING AN IMPRESSION MOLD; DEPOSITING A THIN LAYER OF SILVER ON THE FACE OF SAID MOLD; ELECTRODEPOSITING A COPPER SHELL ON THE SILVERED FACE OF SAID MOLD; ELECTRODEPOSITING TIN ON THE EXPOSED PORTION OF SAID COPPER SHELL; BENDING UP THE PERIPHERAL EDGES OF SAID MOLD TO FORM A DAM AROUND SAID MOLD; APPLYING A LIQUID SENSITIZING AGENT TO THE SAID COPPER SHELL; APPLYING AN EPOXY RESIN COMPOSITION TO THE SENSITIZED COPPER SHELL WHILE RETAINING SAID MOLD AGAINST A SUBSTANTIALLY FLAT PLANE BY VACUUM MEANS; CURING THE SAID EPOXY RESIN COMPOSITION WHILE RETAINING SAID MOLD AGAINST SAID SUBSTANTIALLY FLAT PLANE; STRIPPING THE VINYL RESIN MOLD FROM THE RESULTING EPOXY RESIN BACKED COPPER SHELL TO PROVIDE AN UNFINISHED PLASTIC BACKED ELECTROTYPE; FINISHING SAID PLASTIC BACKED ELECTROTYPE WITH CONVENTIONAL METAL WORKING ELECTROTYPE EQUIPMENT; AND MOUNTING THE FINISHED PLASTIC BACKED ELECTROTYPE.
Claim 2
Independent Claim
167 words
THE METHOD OF FORMING A PLASTIC BACKED ELECTROTYPE WHICH COMPRISES: MAKING A VINYL RESIN IMPRESSION OF AN ORIGINAL TYPE FORM; SEPARATING SAID VINYL IMPRESSION FROM SAID ORIGINAL TYPE FORM, THEREBY PRODUCING AN IMPRESSION MOLD; DEPOSITING A THIN LAYER OF SILVER ON THE FACE OF SAID MOLD; ELECTRODEPOSITING A COPPER SHELL ON THE SILVERED FACE OF SAID MOLD; ELECTRODEPOSITING TIN ON THE EXPOSED PORTION OF SAID COPPER SHELL; BENDING UP THE PERIPHERAL EDGES OF SAID MOLD TO FORM A DAM AROUND SAID MOLD; APPLYING A LIQUID SENSITIZING AGENT TO THE SAID COPPER SHELL; APPLYING AN EPOXY RESIN COMPOSITION TO THE SENSITIZED COPPER SHELL WHILE RETAINING SAID MOLD AGAINST A SUBSTANTIALLY FLAT PLANE BY VACUUM MEANS; CURING THE SAID EPOXY RESIN COMPOSITION WHILE RETAINING SAID MOLD AGAINST SAID SUBSTANTIALLY FLAT PLANE; STRIPPING THE VINYL RESIN MOLD FROM THE RESULTING EPOXY RESIN BACKED COPPER SHELL TO PROVIDE AN UNFINISHED PLASTIC BACKED ELECTROTYPE; FINISHING SAID PLASTIC BACKED ELECTROTYPE WITH CONVENTIONAL METAL WORKING ELECTROTYPE EQUIPMENT; AND MOUNTING THE FINISHED PLASTIC BACKED ELECTROTYPE.
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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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |