US3188218A
Expired / Lapsed
US
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Assignee: Corning Glass Works
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Filing: 1962-10-19
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Granted: 1965-06-08
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Expires: 1982-10-19
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Elmer
- 👤 John P Hoxie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:39
CPC Classifications
C; C03; C03C; C03C23/00; C03C23/0095; C03C1/00; C03C1/10; C03C3/00; C03C3/04; C03C3/06; C03C4/00; C03C4/08; G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/226; C03C2201/00; C03C2201/06; C03C2201/20; C03C2201/28; C03C2201/30; C03C2201/40; C03C2201/50; Y; Y10; Y10S; Y10S501/00; Y10S501/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A LIGHT TRANSMITTING FILTER FOMRED FROM A HIGH SILICA GLASS CONTAINING COLOR-CORRECTING ADDITIVES CONSISTING OF CO2O3, AN ALKALI-METAL OXIDE, AND P2O5 IN AMOUNTS EQUIVALENT TO BETWEEN 0.04 AND 0.1% BY WEIGHT CO2O3, BE TWEEN 0.1 AND 0.2% BY WEIGHT ALKALI METAL OXIDE AND BETWEEN 0.40 AND 2.0% BY WEIGHT P2O5, BASED ON A UNIFORMLY IMPREGNATED HIGH SILICA GLASS OF 4.3 MM. THICKNESS, SAID FILTER PROVIDING A SPECTRAL TRANSMISSION CURVE WHEREIN THE PRESENT TRANSMISSION IN TERMS OF SELECTED WAVELENGTHS IS 61 TO 69% AT 480 MU AND 22 TO 34% AT 590 MU THE PRESENT TRANSMISSION AT 480 MU BEING AT LEAST DOUBLE THE PRESENT TRANSMISSION AT 590 MU.
Claim 2
Dependent Claim
108 words
A LIGHT TRANSMITTING FILTER FOMRED FROM A HIGH SILICA GLASS CONTAINING COLOR-CORRECTING ADDITIVES CONSISTING OF CO2O3, AN ALKALI-METAL OXIDE, AND P2O5 IN AMOUNTS EQUIVALENT TO BETWEEN 0.04 AND 0.1% BY WEIGHT CO2O3, BE TWEEN 0.1 AND 0.2% BY WEIGHT ALKALI METAL OXIDE AND BETWEEN 0.40 AND 2.0% BY WEIGHT P2O5, BASED ON A UNIFORMLY IMPREGNATED HIGH SILICA GLASS OF 4.3 MM. THICKNESS, SAID FILTER PROVIDING A SPECTRAL TRANSMISSION CURVE WHEREIN THE PRESENT TRANSMISSION IN TERMS OF SELECTED WAVELENGTHS IS 61 TO 69% AT 480 MU AND 22 TO 34% AT 590 MU THE PRESENT TRANSMISSION AT 480 MU BEING AT LEAST DOUBLE THE PRESENT TRANSMISSION AT 590 MU.
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |