US6126869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solar blind optical filter
Assignee: Mobium Enterprises Corp
•
Filing: 1999-07-15
•
Granted: 2000-10-03
•
Expires: 2019-07-15
Abstract
Abstract A solar blind optical filter which absorbs solar UV radiation and transmits non-solar UV radiation includes a carrier material and a salt of a dithioic acid of the formula RCS 2 - X + wherein R is an a organic substituent that does not absorb ultraviolet light at wavelengths between 260 nanometers and 300 nanometers and X is a counterion. The solar blind optical filters of the present invention are useful for observing non-solar ultraviolet radiation in the presence of solar radiation.
Inventors
- 👤 Peter D. Haaland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:48
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/223; G02B5/208
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
50 words
A solar blind optical filter comprising a carrier material containing a salt of a dithioic acid of the formula RCS 2 - X + , wherein R is an organic substituent that does not absorb ultraviolet light at wavelengths between 260 nanometers and 300 nanometers and X is a counterion.
Claim 2
Dependent Claim
50 words
A solar blind optical filter comprising a carrier material containing a salt of a dithioic acid of the formula RCS 2 - X + , wherein R is an organic substituent that does not absorb ultraviolet light at wavelengths between 260 nanometers and 300 nanometers and X is a counterion.
Claim 3
Dependent Claim
15 words
The solar blind optical filter of claim 1 wherein R is alkyl or substituted alkyl.
Claim 4
Dependent Claim
16 words
The solar blind optical filter of claim 2 wherein R contains one to four carbon atoms.
Claim 5
Dependent Claim
12 words
The solar blind optical filter of claim 3 wherein R is isopropyl.
Claim 6
Dependent Claim
33 words
The solar blind optical filter of claim 1 wherein said counterion is selected from the group consisting of Na, N(C 2 H 5 ) 4 and C 5 H 10 NH 2 .
Claim 7
Dependent Claim
26 words
The solar blind optical filter of claim 1 wherein said carrier material is selected from the group consisting of water, solvent, polymeric film and solid media.
Claim 8
Dependent Claim
14 words
The solar blind optical filter of claim 6 wherein said polymeric film is polyvinylalcohol.
Claim 9
Dependent Claim
12 words
The solar blind optical filter of claim 7 wherein R is isopropyl.
Claim 10
Dependent Claim
34 words
The solar blind optical filter of claim 8 wherein said counterion is NR 4 + where R is an organic substituent that does not absorb light between wavelengths of 260 nm and 300 nm.
Claim 11
Dependent Claim
19 words
The solar blind optical filter of claim 9 wherein said counterion is N(C 2 H 5 ) 4 .
Claim 12
Dependent Claim
31 words
The solar blind optical filter of claim 10 wherein said salt of a dithioic acid is (CH 3 ) 2 CHCS 2 - N(C 2 H 5 ) 4 + .
Claim 13
Dependent Claim
18 words
The solar blind optical filter of claim 6 wherein said solvent is ethanol, ethylene glycol or combinations thereof.
Claim 14
Dependent Claim
18 words
The solar blind optical filter of claim 6 wherein said solid media is glass, alumina or silica microspheres.
Claim 15
Dependent Claim
33 words
The solar blind optical filter of claim 1 wherein said salt of a dithioic acid is present in said carrier material at a concentration of between about 0.5% and 10% based on weight.
Claim 16
Dependent Claim
29 words
The solar blind optical filter of claim 14 wherein said salt of a dithioic acid is present in said carrier material at a concentration of about 5% by weight.
Claim 17
Dependent Claim
63 words
A solar blind optical filter which absorbs solar UV radiation and transmits non-solar UV radiation comprising a carrier material and a salt of a dithioic acid said salt of a dithioic acid being of the formula RCS 2 -X + wherein R is any moiety that does not absorb UV radiation between about 260 nm and 300 nm and X is a counterion.
Claim 18
Dependent Claim
63 words
A solar blind optical filter which absorbs solar UV radiation and transmits non-solar UV radiation comprising a carrier material and a salt of a dithioic acid said salt of a dithioic acid being of the formula RCS 2 -X + wherein R is any moiety that does not absorb UV radiation between about 260 nm and 300 nm and X is a counterion.
Claim 19
Dependent Claim
86 words
A solar blind optical filter which absorbs solar UV radiation and transmits non-solar UV radiation comprising: a carrier material selected from the group consisting of water, solvent, polymeric film and solid media; and a salt of a dithioic acid of the formula RCS 2 -X + , wherein R is alkyl or substituted alkyl containing one to four carbon atoms, and X is a counterion selected from the group consisting of Na, N(C 2 H 5 ) 4 and C 5 H 10 NH 2 .
Claim 20
Dependent Claim
86 words
A solar blind optical filter which absorbs solar UV radiation and transmits non-solar UV radiation comprising: a carrier material selected from the group consisting of water, solvent, polymeric film and solid media; and a salt of a dithioic acid of the formula RCS 2 -X + , wherein R is alkyl or substituted alkyl containing one to four carbon atoms, and X is a counterion selected from the group consisting of Na, N(C 2 H 5 ) 4 and C 5 H 10 NH 2 .
Claim 21
Dependent Claim
31 words
The solar blind optical filter of claim 17 wherein said salt of a dithioic acid is (CH 3 ) 2 CHCS 2 - N(C 2 H 5 ) 4 + .
Claim 22
Dependent Claim
37 words
The solar blind optical filter of claim 17 wherein said filter has the following transmission characteristics: the transmission (T) is less than 0.005% at 345 nm, and is at least 90% between 270 nm and 300 nm.
Claim 23
Independent Claim
89 words
A method for filtering solar radiation from a combination of solar and non-solar radiation sources, comprising the steps of: (a) providing a solar blind optical filter including a carrier material containing a salt of a dithioic acid of the formula RCS 2 - X + , wherein R is an organic substituient that does not absorb ultraviolet light at wavelengths between 260 nanometers and 300 nanometers and X is a counterion; and (b) positioning the solar blind optical filter in the path of the solar and non-solar radiation sources.
Claim 24
Independent Claim
89 words
A method for filtering solar radiation from a combination of solar and non-solar radiation sources, comprising the steps of: (a) providing a solar blind optical filter including a carrier material containing a salt of a dithioic acid of the formula RCS 2 - X + , wherein R is an organic substituient that does not absorb ultraviolet light at wavelengths between 260 nanometers and 300 nanometers and X is a counterion; and (b) positioning the solar blind optical filter in the path of the solar and non-solar radiation sources.
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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) | 2003-10-03 | 2004-04-03 | 2004-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-10-03 | 2008-04-03 | 2008-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-10-03 | 2012-04-03 | 2012-10-03 | $7700.00 | Window Closed / Lapsed |