US5283697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passive protection of optically sensitive materials with tarnsition-metal organometallic cluster compounds
Assignee: The AT&T MVPD Group LLC
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Filing: 1992-09-04
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Granted: 1994-02-01
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Expires: 2012-09-04
Abstract
Abstract Optically sensitive materials such as sensors or the human eye are passively protected against overexposure to high intensity lig GOVERNMENT RIGHTS This invention was made with Government support under Contract No. N62269-87-C-0263 awarded by the Department of the Navy. The Government has certain rights in this invention.
Inventors
- 👤 Lee W. Tutt
- 👤 Stephen W. McCahon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:22
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/04; A61F9/06; A61F9/065; A61F9/067; G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/3551
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
112 words
A method for protecting a light sensitive material from light of high intensity while permitting it to receive light of low intensity, comprising the step of placing between a light source and an optically sensitive material a semi-transparent absorber medium including a carrier selected from the group consisting of a solvent or a solid polymer, with a reverse saturable absorber formed of an organometallic cluster compound comprising a core of at least two multiply-bonded transition metal atoms selected from group 8, group 6b, or group 7b of the periodic table bonded together with ligands that supply a sufficient number of electrons such that the shells of the core metal atoms are filled.
Claim 2
Independent Claim
112 words
A method for protecting a light sensitive material from light of high intensity while permitting it to receive light of low intensity, comprising the step of placing between a light source and an optically sensitive material a semi-transparent absorber medium including a carrier selected from the group consisting of a solvent or a solid polymer, with a reverse saturable absorber formed of an organometallic cluster compound comprising a core of at least two multiply-bonded transition metal atoms selected from group 8, group 6b, or group 7b of the periodic table bonded together with ligands that supply a sufficient number of electrons such that the shells of the core metal atoms are filled.
Claim 3
Dependent Claim
15 words
The method of claim 1, wherein the metal cluster complex is cyclopentadienyl iron carbonyl tetramer.
Claim 4
Dependent Claim
23 words
The method of claim 1, wherein the ligand is selected from the group consisting of triphenyl phosphine, trimethyl phosphine, triethyl phosphine, and cyclopentadiene.
Claim 5
Dependent Claim
11 words
The method of claim 1, wherein the core is iron tetramer.
Claim 6
Dependent Claim
11 words
The method of claim 1, wherein the core is iron tricobalt.
Claim 7
Dependent Claim
14 words
The method of claim 1, wherein the optically sensitive material is an optoelectronic sensor.
Claim 8
Dependent Claim
14 words
The method of claim 1, wherein the optically sensitive material is a human eye.
Claim 9
Dependent Claim
12 words
The method of claim 1, wherein the light source is a laser.
Claim 10
Independent Claim
72 words
A method of protecting a light sensitive material from high-intensity light, comprising the step of placing over the optically sensitive material an absorber medium including a carrier selected from the group consisting of a solvent or a solid polymer, with a reverse saturable absorber formed of an organometallic cluster compound comprising at least two multiply-bonded transition metal atoms and a ligand selected such that the organometallic cluster compound has filled electron shells.
Claim 11
Independent Claim
72 words
A method of protecting a light sensitive material from high-intensity light, comprising the step of placing over the optically sensitive material an absorber medium including a carrier selected from the group consisting of a solvent or a solid polymer, with a reverse saturable absorber formed of an organometallic cluster compound comprising at least two multiply-bonded transition metal atoms and a ligand selected such that the organometallic cluster compound has filled electron shells.
Claim 12
Dependent Claim
25 words
The method of claim 1, wherein the number of transition metal atoms in the core of the organometallic cluster compound is from two to four.
Claim 13
Dependent Claim
25 words
The method of claim 9, wherein the number of transition metal atoms in the core of the organometallic cluster compound is from two to four.
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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) | 1997-01-31 | 1997-08-02 | 1998-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-31 | 2001-08-02 | 2002-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-31 | 2005-08-02 | 2006-02-01 | $7700.00 | Window Closed / Lapsed |