US3022181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass color filter
Assignee: Corning Glass Works
•
Filing: 1961-02-01
•
Granted: 1962-02-20
•
Expires: 1981-02-01
Abstract
No abstract record available.
Inventors
- 👤 John H Connelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:30
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/08; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C3/087; G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/226; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/905
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
53 words
A GLASS HAVING SPECIFIC, PREDETERMINED TRANSMITTANCE PEAKS AND VALLEYS IN THE ULTRA-VIOLET OF THE SPECTRUM WHICH CONSISTS ESSENTIALLY ON THE OXIDE BASIS AS COMPUTED FROM THE BATCH IN PERCENT BY WEIGHT OF 50-65% SIO2, 2-6% AL2O3, 4-10% NA2O, 4-10% K2O, THE TOTAL OF NA2O AND K2O BEING 12-15%, 10-15% BAO, AND 3-15% HO2O3.
References Cited (Backward Citations)
US2805166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |