Patent US3275828A successfully refreshed from Google Patents.
US3275828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiographic intensifying means
Assignee: Individual
•
Filing: 1962-04-02
•
Granted: 1966-09-27
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Expires: 1982-04-02
Abstract
No abstract record available.
Inventors
- 👤 Georg S Mittelstaedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:55
CPC Classifications
G; G21; G21K; G21K4/00; Y; Y10; Y10S; Y10S430/00; Y10S430/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
RADIOGRAPHIC INTENSIFYING SCREEN COMPRISING A SUPPORT AND A MIXTURE OF ONLY RED AND BLUE FLUORESCENT DOTS LAID DOWN ON SAID SUPPORT SUBSTANTIALLY SIDE BY SIDE IN SINGLE THICKNESS.
Claim 2
Dependent Claim
28 words
RADIOGRAPHIC INTENSIFYING SCREEN COMPRISING A SUPPORT AND A MIXTURE OF ONLY RED AND BLUE FLUORESCENT DOTS LAID DOWN ON SAID SUPPORT SUBSTANTIALLY SIDE BY SIDE IN SINGLE THICKNESS.
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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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |