US2581440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbing glasses and method of making same
Assignee: American Optical Corp
•
Filing: 1948-07-03
•
Granted: 1952-01-08
•
Expires: 1968-07-03
Abstract
No abstract record available.
Inventors
- 👤 Alexis G Pincus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:32
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/10; C03C4/00; C03C4/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
AN INFRA-RED AND ULTRA-VIOLET ABSORBING GLASS HAVING ITS DOMINANT WAVE LENGHT OF TRANSMISSION ADJACENT THE MIDDLE PART OF THE VISIBLE REGION OF THE SPECTRUM, WITH ITS TRANSMISSION CHARACTER ISTICS OF WAVE LENGTHS ON EACH SIDE OF SAID DOMINANT WAVE LENGTH PROGRESSIVELY DECREASING TO SUBSTANTIALLY COMPLETE ABSORPTION IN THE ULTRA-VIOLET AND INFRA-RED REGIONS, SAID GLASS CONSISTING OF A SILICA-SODA-POTASH-LIME BASE COMBINED WITH FROM ABOUT 1.5 TO 6.5 PER CENT BY WEIGHT OF A MIXTURE OF FERRIC AND FERROUS OXIDES AND A SMALL FRACTION OF ONE PER CENT OF A METAL OXIE SELECTED FROM THE GROUP CONSISTING OF VANDIUM OXIDES, CHROMIUM OXIDE AND MIXTURES THEREOF, THE SILICA CONTENT COMPRISING THE PREDOMINANT CONSTITUENT OF THE GLASS.
Claim 2
Dependent Claim
113 words
AN INFRA-RED AND ULTRA-VIOLET ABSORBING GLASS HAVING ITS DOMINANT WAVE LENGHT OF TRANSMISSION ADJACENT THE MIDDLE PART OF THE VISIBLE REGION OF THE SPECTRUM, WITH ITS TRANSMISSION CHARACTER ISTICS OF WAVE LENGTHS ON EACH SIDE OF SAID DOMINANT WAVE LENGTH PROGRESSIVELY DECREASING TO SUBSTANTIALLY COMPLETE ABSORPTION IN THE ULTRA-VIOLET AND INFRA-RED REGIONS, SAID GLASS CONSISTING OF A SILICA-SODA-POTASH-LIME BASE COMBINED WITH FROM ABOUT 1.5 TO 6.5 PER CENT BY WEIGHT OF A MIXTURE OF FERRIC AND FERROUS OXIDES AND A SMALL FRACTION OF ONE PER CENT OF A METAL OXIE SELECTED FROM THE GROUP CONSISTING OF VANDIUM OXIDES, CHROMIUM OXIDE AND MIXTURES THEREOF, THE SILICA CONTENT COMPRISING THE PREDOMINANT CONSTITUENT OF THE GLASS.
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) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |