Patent US2530232A successfully refreshed from Google Patents.
US2530232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing intaglio printing surfaces
Assignee: Individual
•
Filing: 1945-11-20
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Granted: 1950-11-14
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Expires: 1965-11-20
Abstract
No abstract record available.
Inventors
- 👤 William M Devers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:47
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A POSITIVE HALF-TONE TRANSPARENCY OF A SUBJECT ADAPTED FOR USE IN THE PREPARATION OF AN INTAGLIO PRINTING SURFACE, SAID TRANSPARENCY DEPICTING THE TONES OF THE SUBJECT BY DOTS VARYING IN SIZE IN ACCORDANCE WITH THE VARYING TONES OF THE SUBJECT, THE LARGER OF SAID DOTS HAVING OPAQUE SILVER GRAIN CENTERS AND TRANSPARENT COLORED PERIPHERAL FRINGES SURROUNDED BY A FIELD CONSISTING OF A COLORLESS TRANSPARENT AREA.
References Cited (Backward Citations)
GB274422A
Cited
US1773887A
Cited
US1948604A
Cited
DE593839C
Cited
US2061688A
Cited
US2155458A
Cited
US2226086A
Cited
US2096794A
Cited
US2331772A
Cited
US2446193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |