US2526759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate for photoengraving and enamel therefor
Assignee: Individual
•
Filing: 1949-04-06
•
Granted: 1950-10-24
•
Expires: 1969-04-06
Abstract
No abstract record available.
Inventors
- 👤 Walter W Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:26
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A SENSITIZING ENAMEL COMPOSITION FOR COATING PHOTOENGRAVING PLATES WHICH COMPRISES, TWELVE (12) OUNCES OF EGG ALBUMEN, SIXTEEN (16) OUNCES OF PHOTOENGRAVING GLUE, ONE AND ONE-HALF (1 1/2) OUNCES OF BICHROMATE OF AMMONIA, FORTY (40) GRAMS OF CITRATE OF IRON, THIRTY (30) DROPS OF STRONG AMMONIA WATER, AND SIXTY-EIGHT (68) OUNCES OF DISTILLED WATER.
Claim 2
Dependent Claim
53 words
A SENSITIZING ENAMEL COMPOSITION FOR COATING PHOTOENGRAVING PLATES WHICH COMPRISES, TWELVE (12) OUNCES OF EGG ALBUMEN, SIXTEEN (16) OUNCES OF PHOTOENGRAVING GLUE, ONE AND ONE-HALF (1 1/2) OUNCES OF BICHROMATE OF AMMONIA, FORTY (40) GRAMS OF CITRATE OF IRON, THIRTY (30) DROPS OF STRONG AMMONIA WATER, AND SIXTY-EIGHT (68) OUNCES OF DISTILLED WATER.
References Cited (Backward Citations)
US915666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |