US3072546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graining printing plates
Assignee: Lawton Printing Co
•
Filing: 1959-03-02
•
Granted: 1963-01-08
•
Expires: 1979-03-02
Abstract
No abstract record available.
Inventors
- 👤 Wruck Max Waldemar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:05
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/034; C; C25; C25F; C25F3/00; C25F3/02; C25F3/04; Y; Y10; Y10S; Y10S205/00; Y10S205/921; Y10S430/00; Y10S430/136
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN THE MAKING OF GRAINED ALUMINUM PRINTING PLATES, A METHOD OF PRODUCING THE GRAINED SURFACE WHICH COMPRISES SUBJECTING OPPOSED SURFACES OF TWO PLATES TO AN ALTERNATING CURRENT OF ABOUT 8 VOLTS WHILE THEY ARE IMMERSED IN A HYDROCHLORIC ACID SOLUTION OF 1/2 BAUME TO 1 BAUME STRENGTH IN WATER AT A SPACING OF 3/4 TO 1 1/2 INCH AND AT A TEMPERATURE OF ABOUT 15 DEGREES C. TO 26 DE-
Claim 2
Dependent Claim
70 words
IN THE MAKING OF GRAINED ALUMINUM PRINTING PLATES, A METHOD OF PRODUCING THE GRAINED SURFACE WHICH COMPRISES SUBJECTING OPPOSED SURFACES OF TWO PLATES TO AN ALTERNATING CURRENT OF ABOUT 8 VOLTS WHILE THEY ARE IMMERSED IN A HYDROCHLORIC ACID SOLUTION OF 1/2 BAUME TO 1 BAUME STRENGTH IN WATER AT A SPACING OF 3/4 TO 1 1/2 INCH AND AT A TEMPERATURE OF ABOUT 15 DEGREES C. TO 26 DE-
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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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |