Patent US4732544A successfully refreshed from Google Patents.
Patent US2854336A successfully refreshed from Google Patents.
US2854336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a two-level photoengraved embossing plate or mold
Assignee: Youngstown Arc Engraving Co
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Filing: 1955-03-07
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Granted: 1958-09-30
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Expires: 1975-03-07
Abstract
No abstract record available.
Inventors
- 👤 William J Gutknecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:04
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/0035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE METHOD OF PRODUCING A TWO-LEVEL PHOTOENGRAVED ELEMENT COMPRISING THE STEPS OF FORMING A FIRST DESIGN FROM A FIRST COVERING OF LIGHT SENSITIVE MATERIAL WHICH BECOMES ETCHANT RESISTANT UNDER THE ACTION OF LIGHT ON A FACE OF SAID ELEMENT BY PLACING NEGATIVE IN CONTACT WITH SAID COVERING, SUBJECTING THE ELEMENT TO THE ACTION OF LIGHT AND DEVELOPING AND FIXING SAID COVERING ON THE ELEMENT, ETCHING THE ELEMENT IN THE AREAS PERMITTED BY SAID DEVELOPED AND FIXED COVERING, APPLYING A SECOND COVERING OF SAID LIGHT SENSITIVE MATERIAL ON SAID ETCHED ELEMENT WHICH RETAINS THE DEVELOPED AND FIXED COVERING PREVIOUSLY APPLIED, FORMING A SECOND DESIGN FROM SAID SECOND COVERING BY PLACING A SECOND NEGATIVE HAVING A DESIGN IN AREAS CORRESPONDING TO AT LEAST SOME OF THE AREAS NOT OC-
Claim 2
Independent Claim
127 words
THE METHOD OF PRODUCING A TWO-LEVEL PHOTOENGRAVED ELEMENT COMPRISING THE STEPS OF FORMING A FIRST DESIGN FROM A FIRST COVERING OF LIGHT SENSITIVE MATERIAL WHICH BECOMES ETCHANT RESISTANT UNDER THE ACTION OF LIGHT ON A FACE OF SAID ELEMENT BY PLACING NEGATIVE IN CONTACT WITH SAID COVERING, SUBJECTING THE ELEMENT TO THE ACTION OF LIGHT AND DEVELOPING AND FIXING SAID COVERING ON THE ELEMENT, ETCHING THE ELEMENT IN THE AREAS PERMITTED BY SAID DEVELOPED AND FIXED COVERING, APPLYING A SECOND COVERING OF SAID LIGHT SENSITIVE MATERIAL ON SAID ETCHED ELEMENT WHICH RETAINS THE DEVELOPED AND FIXED COVERING PREVIOUSLY APPLIED, FORMING A SECOND DESIGN FROM SAID SECOND COVERING BY PLACING A SECOND NEGATIVE HAVING A DESIGN IN AREAS CORRESPONDING TO AT LEAST SOME OF THE AREAS NOT OC-
References Cited (Backward Citations)
US297017A
Cited
US567030A
Cited
US1532696A
Cited
GB571107A
Cited
GB597045A
Cited
US2390618A
Cited
GB664353A
Cited
US2639660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |