US3121037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for preparing rotogravure plates
Assignee: DETROLT GRAVURE Corp
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Filing: 1959-05-19
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Granted: 1964-02-11
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Expires: 1979-05-19
Abstract
No abstract record available.
Inventors
- 👤 Emil G Boitos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:03
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/18; B41C1/188; C; C23; C23F; C23F1/00; C23F1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
THAT PROCESS OF ROTOGRAVURE ETCHING THROUGH THE RESIST-COVERED SURFACE OF A COPPER CYLINDER AND WHILE ROTATING THE CYLINDER WHICH COMPRISES DIRECTING AN ETCHING FERRIC CHLORIDE SOLUTION OF A PREDETERMINED BE. READING OVER SUCH RESIST-COVERED COPPER SURFACE AND DURING THE ROTATION OF THE CYLINDER THROUGHOUT AN INITIAL PREDETERMINED TIME PERIOD, AND THEN CONTINUING SUCH DIRECTING OF ETCHING SOLUTION OVER SAID RESIST-COVERED SURFACE OF THE CYLINDER WITH A REGULATED CONSTANTLY DIMINISHING BE. READING FOR AN INTERMEDIATE PREDETERMINED TIME PERIOD AND UNTIL THE CONCENTRATION DROPS TO A PREDETERMINED MININUM BE. READING AND THEN CONTINUING THE DIRECTING OF SUCH ETCHING SOLUTION AT SAID MINIMUM BE. READING FOR THAT FINAL PERIOD OF TIME NECESSARY TO COMPLETE THE ETCHING OF THE SURFACE OF THE CYLINDER.
Claim 2
Dependent Claim
137 words
APPARATUS FOR ETCHING THE RESIST-COVERED SURFACE OF A METAL CYLINDER COMPRISING, IN COMBINATION: AN ELONGATE ETCHING SOLUTION TROUGH, MEANS FOR SUPPORTING AND ROTATING SAID CYLINDER EXTENDING INTO THE TROUGH, MEANS FOR DELIVERING ETCHING SOLUTION LIQUID FROM A SOURCE TO SAID TROUGH AND MAINTAINING THE SURFACE OF SOLUTION IN THE TROUGH SPACED BELOW THE UNDERSIDE OF THE RESISTCOVERED SURFACE OF THE ROTATING CYLINDER, MEANS FOR INTRODUCING A GAS INTO THE LIQUID ETCHING SOLUTION BELOW THE SURFACE THEREOF AND BENEATH THE CYLINDER AND ALONG THE LENGTH THEREOF TO BUBBLE SOLUTION UPWARDLY AGAINST THE UNDERSIDE OF THE RESIST-COVERED SURFACE OF THE ROTATING CYLINDER INCLUDING A PIPE HAVING GAS ESCAPE ORIFICE MEANS DISPOSED IN THE TROUGH BENEATH THE SURFACE OF THE ETCHING SOLUTION AND BENEATH THE LINE OF BUBBLING CONTACT OF BUBBLING SOLUTION WITH SAID UNDERSIDE RESIST-COVERED SURFACE OF THE CYLINDER.
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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) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |