US3425867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam recording medium with acid sensitive indicator and halogenated polymer coating
Assignee: 3M Co
•
Filing: 1963-09-23
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Granted: 1969-02-04
•
Expires: 1983-09-23
Abstract
No abstract record available.
Inventors
- 👤 Horatio Serafino Stillo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:55
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/733; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/14; Y; Y10; Y10S; Y10S430/00; Y10S430/143
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A RECORDING MEDIUM WHICH IS STABLE UNDER VACUUM CONDITIONS USED IN ELECTRON BEAM RECORDING AND WHICH COMPRISES AN ELECTRICALLY CONDUCTIVE METALLIC SUBSTRATE AND, SUPERIMPOSED THEREON, AN ACID-SENSITIVE INDICATOR CAPABLE OF CHANGING COLOR AT A PH BELOW ABOUT 7 AND, AS THE SOLE REMAINING CONSTITUENT CAPABLE OF LIBERATING HYDROGEN HALIDE UNDER EXPOSURE TO AN ELECTRON BEAM, A NORMALLY SOLID, HIGHLY HALOGENATED POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 1000 AND HAVING AT LEAST 25 WEIGHT PERCENT OF LABILE HALOGEN SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE.
Claim 2
Dependent Claim
89 words
A RECORDING MEDIUM WHICH IS STABLE UNDER VACUUM CONDITIONS USED IN ELECTRON BEAM RECORDING AND WHICH COMPRISES AN ELECTRICALLY CONDUCTIVE METALLIC SUBSTRATE AND, SUPERIMPOSED THEREON, AN ACID-SENSITIVE INDICATOR CAPABLE OF CHANGING COLOR AT A PH BELOW ABOUT 7 AND, AS THE SOLE REMAINING CONSTITUENT CAPABLE OF LIBERATING HYDROGEN HALIDE UNDER EXPOSURE TO AN ELECTRON BEAM, A NORMALLY SOLID, HIGHLY HALOGENATED POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 1000 AND HAVING AT LEAST 25 WEIGHT PERCENT OF LABILE HALOGEN SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE.
References Cited (Backward Citations)
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US2489537A
Cited
US2727828A
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US2855266A
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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) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |