US3104176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical filters and method of making same
Assignee: American Optical Corp
•
Filing: 1961-01-17
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Granted: 1963-09-17
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Expires: 1981-01-17
Abstract
No abstract record available.
Inventors
- 👤 Richard J Hovey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:25
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/02; A61F9/022; G; G02; G02B; G02B5/00; G02B5/20; G02B5/208; G02B5/22; G02B5/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A METHOD FOR MAKING A PLASTIC FILTER MATERIAL WHICH COMPRISES THE STEPS OF PROVIDING AN AQUEOUS SOLUTION OF CUUPRIC CHLORIDE IN CONCENTRATION BETWEEN APPROXIMATELY TWENTY PERRCENTT (20%) AND THIRTY-EIGHT PERCENT (38%), PROVIDING A POLYVINLY ALCOHOL MATERIAL, IMMERSING THE POLYVINYL ALCOHOL MATERIAL IN SAID SOLUTION FOR A PERIOD BETWEEN TWO (2) MINUTES AND APPROXIMATELY ONE (1) HOUR TO PERMIT IMBIBITION OF THE SOLUTION BY THE POLYVINYL ALCOHOL MATERIAL, REGULATING THE TEMPERATURE OF THE SOLUTION AND POLYVINYL ALCOHOL MATERIAL BETWEEN ROOM TEMPERATURE AND APPRROXIMATELY 50*C. DURING SAID IMMERSION, REMOVING SAID POLYVINYL ALCOHOL MATERIAL FROM SAID SOLUTION, AND DRYING THE POLYVINYL ALCOHOL MATERIAL IN AIR AT ROOM TEMPERATURE, WHEREBY TO PROVIDE THE POLY VINYL ALCOHOL MATERIAL WITH A DISPERSAL OF SAID CUPRIC CHLORIDE THEREIN SO THAT THE POLYVINYL ALCOHOL MATERIAL IS ADAPTED FOR RELATIVELY HIGH TRANSMISSION OF VISIBLE LIGHT AND FOR RELATIVELY HIGH ABSORPTION OF INFRA-RED AND ULTRAVIOLET LIGHT.
Claim 2
Independent Claim
146 words
A METHOD FOR MAKING A PLASTIC FILTER MATERIAL WHICH COMPRISES THE STEPS OF PROVIDING AN AQUEOUS SOLUTION OF CUUPRIC CHLORIDE IN CONCENTRATION BETWEEN APPROXIMATELY TWENTY PERRCENTT (20%) AND THIRTY-EIGHT PERCENT (38%), PROVIDING A POLYVINLY ALCOHOL MATERIAL, IMMERSING THE POLYVINYL ALCOHOL MATERIAL IN SAID SOLUTION FOR A PERIOD BETWEEN TWO (2) MINUTES AND APPROXIMATELY ONE (1) HOUR TO PERMIT IMBIBITION OF THE SOLUTION BY THE POLYVINYL ALCOHOL MATERIAL, REGULATING THE TEMPERATURE OF THE SOLUTION AND POLYVINYL ALCOHOL MATERIAL BETWEEN ROOM TEMPERATURE AND APPRROXIMATELY 50*C. DURING SAID IMMERSION, REMOVING SAID POLYVINYL ALCOHOL MATERIAL FROM SAID SOLUTION, AND DRYING THE POLYVINYL ALCOHOL MATERIAL IN AIR AT ROOM TEMPERATURE, WHEREBY TO PROVIDE THE POLY VINYL ALCOHOL MATERIAL WITH A DISPERSAL OF SAID CUPRIC CHLORIDE THEREIN SO THAT THE POLYVINYL ALCOHOL MATERIAL IS ADAPTED FOR RELATIVELY HIGH TRANSMISSION OF VISIBLE LIGHT AND FOR RELATIVELY HIGH ABSORPTION OF INFRA-RED AND ULTRAVIOLET LIGHT.
References Cited (Backward Citations)
US2662035A
Cited
US2816047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-16 | 1967-03-18 | 1967-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-16 | 1971-03-18 | 1971-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-16 | 1975-03-18 | 1975-09-17 | $7700.00 | Window Closed / Lapsed |