US2434019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color separation with fluorescent materials
Assignee: Individual
•
Filing: 1942-03-10
•
Granted: 1948-01-06
•
Expires: 1962-03-10
Abstract
No abstract record available.
Inventors
- 👤 Joseph L Switzer
- 👤 Robert C Switzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:55
CPC Classifications
G; G03; G03F; G03F3/00; G03F3/04; B; B41; B41M; B41M3/00; B41M3/06; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24736; Y10T428/31504; Y10T428/31942; Y10T428/31971; Y10T428/31975
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1099710A
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GB308376A
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US2286780A
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US2286779A
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US2319079A
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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) | 1951-01-05 | 1951-07-07 | 1952-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-05 | 1955-07-07 | 1956-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-05 | 1959-07-07 | 1960-01-06 | $7700.00 | Window Closed / Lapsed |