US2979467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared stimulable phosphors
Assignee: International Business Machines Corp
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Filing: 1958-06-30
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Granted: 1961-04-11
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Expires: 1978-06-30
Abstract
No abstract record available.
Inventors
- 👤 Seymour P Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:39
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7766; C09K11/7767; C09K11/7768
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
32 words
INFRARED STIMULABLE PHOSPHORS CONSISTING ESSENTIALLY OF AN ALKALINE EARTH SULFIDE BASE AND 0.005-0.5 MOL PERCENT OF ONE PAIR OF ACTIVATORS SELECTED FROM THE GROUP CONSISTING OF GD-SM, HO-SM, CE-TM, EU-TM AND YB-SM.
Claim 2
Dependent Claim
32 words
INFRARED STIMULABLE PHOSPHORS CONSISTING ESSENTIALLY OF AN ALKALINE EARTH SULFIDE BASE AND 0.005-0.5 MOL PERCENT OF ONE PAIR OF ACTIVATORS SELECTED FROM THE GROUP CONSISTING OF GD-SM, HO-SM, CE-TM, EU-TM AND YB-SM.
Claim 3
Dependent Claim
30 words
A MEMORY STORAGE PHOSPHOR WHICH EXHIBITS A HIGH DEGREE OF STIMULABILITY IN THE INFRARED, CONSISTING ESSENTIALLY OF SRS DOUBLY ACTIVATED WITH 0.02 MOLE PERCENT GD AND 0.02 MOLE PERCENT SM.
Claim 4
Dependent Claim
30 words
A MEMORY STORAGE PHOSPHOR WHICH EXHIBITS A HIGH DEGREE OF STIMULABILITY IN THE INFRARED, CONSISTING ESSENTIALLY OF SRS DOUBLY ACTIVATED WITH 0.02 MOLE PERCENT GD AND 0.02 MOLE PERCENT SM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |