Patent US3024381A successfully refreshed from Google Patents.
US3024381A
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Light filter and method of production
Assignee: Corning Glass Works
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Filing: 1957-09-04
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Granted: 1962-03-06
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Expires: 1977-09-04
Abstract
No abstract record available.
Inventors
- 👤 Robert H Dalton
- 👤 Grego Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:49
CPC Classifications
H; H01; H01K; H01K3/00; H01K3/005; C; C03; C03C; C03C17/00; C03C17/22; C23; C23C; C23C14/00; C23C14/06; C23C14/0623; G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; C03C2217/00; C03C2217/20; C03C2217/28; C03C2217/287; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/151; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
FOR USE IN PROVIDING A FILTERED, PURE COLOR LIGHT FROM AN INCANDESCENT LAMP, A LIGHT FILTER WITH A SHARP TRANSMISSION CUT-OFF IN THE WAVE LENGTH RANGE OF 5000-7000
Claim 2
Dependent Claim
28 words
FOR USE IN PROVIDING A FILTERED, PURE COLOR LIGHT FROM AN INCANDESCENT LAMP, A LIGHT FILTER WITH A SHARP TRANSMISSION CUT-OFF IN THE WAVE LENGTH RANGE OF 5000-7000
References Cited (Backward Citations)
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US2600579A
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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) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |