US3131238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for molding zinc sulfide
Assignee: Eastman Kodak Co
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Filing: 1961-03-20
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Granted: 1964-04-28
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Expires: 1981-03-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward Carnall
- 👤 Paul B Mauer
- 👤 William F Parsons
- 👤 Donald W Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:36
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/02; Y; Y10; Y10S; Y10S264/00; Y10S264/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE METHOD OF FORMING A HOMOGENOUS SOLID OF MOLDED ZINC SULFIDE HAVING A DENSITY IN THE RANGE OF FROM 99% UP TO AND INCLUDING THERORETICAL DENSITY WHICH COMPRISES MOLDING ZINC SULFIDE POWDER UNDER A PRESSURE OF AT LEAST 20000 POUNDS PER SQUARE INCH AND AT TEMPERATURE WITHIN A RANGE OF 1420*F. TO 1770*F. WHILE IN AN INERT ATMOSPHERE.
Claim 2
Independent Claim
58 words
THE METHOD OF FORMING A HOMOGENOUS SOLID OF MOLDED ZINC SULFIDE HAVING A DENSITY IN THE RANGE OF FROM 99% UP TO AND INCLUDING THERORETICAL DENSITY WHICH COMPRISES MOLDING ZINC SULFIDE POWDER UNDER A PRESSURE OF AT LEAST 20000 POUNDS PER SQUARE INCH AND AT TEMPERATURE WITHIN A RANGE OF 1420*F. TO 1770*F. WHILE IN AN INERT ATMOSPHERE.
References Cited (Backward Citations)
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Cited
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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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |