Patent US2434019A successfully refreshed from Google Patents.
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 22:36
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1099710A
Cited
GB308376A
Cited
GB308375A
Cited
US2008290A
Cited
US2108503A
Cited
US2161378A
Cited
US2161399A
Cited
US2191939A
Cited
US2277169A
Cited
US2278114A
Cited
US2286780A
Cited
US2286779A
Cited
US2319079A
Cited
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 |