US2592546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoengraving
Assignee: Individual
•
Filing: 1947-06-10
•
Granted: 1952-04-15
•
Expires: 1967-06-10
Abstract
No abstract record available.
Inventors
- 👤 Dirkman Agnes Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:01
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/02; B41C1/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
198 words
THE METHOD OF REETCHING A PARTIALLY ETCHED HALF-TONE PHOTO-ENGRAVED PLATE TO EFFECT A GRADUAL LIGHTENING OF THE TONES THEREOF, WHICH COMPRISES APPLYING TO THE ETCHED SURFACE OF THE PLATE TO FILL IN THE ETCHED AREAS THEROF A HARD, ADHESIVE, ACID-RESISTANT, WATER-IMMISCIBLE PROTECTIVE MATERIAL CONTAINING AS ESSENTIAL INGREDIENTS A PLUALITY OF HARD WAXES INCLUDING CANDELILLA WAX, SAID HARD WAXES TOGETHER COMPRISING THE MAJOR PROPORTION OF SAID PROTECTIVE MATERIAL, THE AMOUNT OF CANDELILLA WAX BEING AT LEAST EQUAL TO THAT OF ANY OF THE OTHER HARD WAXES, REMOVING THE PROTECTIVE MATERIAL FROM SUCH FILLED-IN ETCHED AREAS OF THE PLATE TO EXPOSE ONLY A PORTION THEREOF, THEN TREATING THE PLATE WITH AN ACIDIC ETCHING MEDIUM TO EFFECT AN INITIAL REDUCTION IN THE SIZE OF THE PRINTING DOTS IN SUCH EXPOSED, UNPROTECTED PORTION, REMOVING THE PROTECTIVE MATERIAL FROM A FURTHER PORTION OF THE ETCHED AREAS OF THE PLATE, AGAIN TREATING THE PLATE WITH AN ACIDIC ETCHING MEDIUM TO EFFECT A FURTHER REDUCTION IN THE SIZE OF THE PRINTING DOTS IN THE RESULTING UNPROTECTED PORTION THERETO, AND REPEATING SUCH REMOVAL OF THE PROTECTIVE MATERIAL FROM THE ETCHED AREAS AND SUCH TREATMENT WITH THE ETCHING MEDIUM UNTIL THE DESIRED DEGREE OF LIGHTENING IS ACCOMPLISHED.
Claim 2
Independent Claim
198 words
THE METHOD OF REETCHING A PARTIALLY ETCHED HALF-TONE PHOTO-ENGRAVED PLATE TO EFFECT A GRADUAL LIGHTENING OF THE TONES THEREOF, WHICH COMPRISES APPLYING TO THE ETCHED SURFACE OF THE PLATE TO FILL IN THE ETCHED AREAS THEROF A HARD, ADHESIVE, ACID-RESISTANT, WATER-IMMISCIBLE PROTECTIVE MATERIAL CONTAINING AS ESSENTIAL INGREDIENTS A PLUALITY OF HARD WAXES INCLUDING CANDELILLA WAX, SAID HARD WAXES TOGETHER COMPRISING THE MAJOR PROPORTION OF SAID PROTECTIVE MATERIAL, THE AMOUNT OF CANDELILLA WAX BEING AT LEAST EQUAL TO THAT OF ANY OF THE OTHER HARD WAXES, REMOVING THE PROTECTIVE MATERIAL FROM SUCH FILLED-IN ETCHED AREAS OF THE PLATE TO EXPOSE ONLY A PORTION THEREOF, THEN TREATING THE PLATE WITH AN ACIDIC ETCHING MEDIUM TO EFFECT AN INITIAL REDUCTION IN THE SIZE OF THE PRINTING DOTS IN SUCH EXPOSED, UNPROTECTED PORTION, REMOVING THE PROTECTIVE MATERIAL FROM A FURTHER PORTION OF THE ETCHED AREAS OF THE PLATE, AGAIN TREATING THE PLATE WITH AN ACIDIC ETCHING MEDIUM TO EFFECT A FURTHER REDUCTION IN THE SIZE OF THE PRINTING DOTS IN THE RESULTING UNPROTECTED PORTION THERETO, AND REPEATING SUCH REMOVAL OF THE PROTECTIVE MATERIAL FROM THE ETCHED AREAS AND SUCH TREATMENT WITH THE ETCHING MEDIUM UNTIL THE DESIRED DEGREE OF LIGHTENING IS ACCOMPLISHED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |