US5183602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infra red diamond composites
Assignee: Cornell Research Foundation Inc
•
Filing: 1989-09-18
•
Granted: 1993-02-02
•
Expires: 2009-09-18
Abstract
Abstract New composites useful for infrared transmitting applications comprise a dispersion of small particles of diamonds in a matrix having infrared transmission properties (from about 1 to at least 10 mu m wavelength) and refractive index substantially similar to that of diamond. The composites exhibit mechanical toughness and durability 2-4 times that of the similarly treated matrix alone without adverse effect on optical properties.
Inventors
- 👤 Rishi Raj
- 👤 Albert J. Sievers
- 👤 Liang Yue
- 👤 Tae W. Noh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:52
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/547; G; G02; G02B; G02B1/00; G02B5/00; G02B5/20; G02B5/22; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12625
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
112 words
An infrared transmitting composite which comprises finely divided diamond particles having a particle size of from about 0.01 to 5 micrometer diameter uniformly dispersed in a matrix that transmits infrared light wherein said diamond particles are present in the composite at a volume concentration of from about 0.1 to about 75 volume percent; wherein said matrix is selected from the group consisting of one or more of the following: zinc sulfide, zinc selenide, barium monosulfide, calcium sulfide, carbon fluoride, magnesium sulfide, cadmium telluride, gallium arsenide, thorium chloride, thorium iodide, thorium tetrafluoride, arsenic trisulfide and tin iodide and wherein said composite exhibits improved mechanical properties and toughness over that of the matrix alone.
Claim 2
Dependent Claim
112 words
An infrared transmitting composite which comprises finely divided diamond particles having a particle size of from about 0.01 to 5 micrometer diameter uniformly dispersed in a matrix that transmits infrared light wherein said diamond particles are present in the composite at a volume concentration of from about 0.1 to about 75 volume percent; wherein said matrix is selected from the group consisting of one or more of the following: zinc sulfide, zinc selenide, barium monosulfide, calcium sulfide, carbon fluoride, magnesium sulfide, cadmium telluride, gallium arsenide, thorium chloride, thorium iodide, thorium tetrafluoride, arsenic trisulfide and tin iodide and wherein said composite exhibits improved mechanical properties and toughness over that of the matrix alone.
Claim 3
Dependent Claim
53 words
The composite of claim 1 wherein the diamond has a particle size of from about 0.1 to about 5.0 micrometer diameter, the matrix has a particle size of from about 0.5 micrometer to about 50 micrometer, and the diamond is dispersed in the matrix at from about 1 to about 30 volume percent.
Claim 4
Dependent Claim
20 words
The composite of claim 2 wherein the matrix material has a refractive index of from about 2.00 to about 2.80.
Claim 5
Dependent Claim
11 words
The composite of claim 2 wherein the matrix comprises zinc sulfide.
Claim 6
Dependent Claim
11 words
The composite of claim 2 wherein the matrix comprises zinc selenide.
Claim 7
Dependent Claim
17 words
The composite of claim 1 wherein the matrix is an alloy comprising zinc sulfide and zinc selenide.
Claim 8
Dependent Claim
25 words
The composition of claim 2 wherein the diamond particles are uniformly dispersed in the matrix at lateral distances of from about 0.01 to 5.0 μm.
Claim 9
Dependent Claim
17 words
The composite of claim 2 wherein the said matrix transmits infrared light wavelengths longer than 8 micrometers.
Claim 10
Dependent Claim
26 words
The composite of claim 2 wherein the said matrix is transparent to infrared light at wavelengths in the range of from about 8 to 15 micrometers.
Claim 11
Dependent Claim
61 words
A composite for infrared transmitting applications which comprises a dispersion of diamond particles in a matrix which transmits infrared light, said diamond particles, having a particle size from about 0.01 to 5.0 micrometer diameter, being uniformly dispersed in said matrix comprising an alloy of zinc sulfide and zinc selenide at a concentration of from about 1 to about 75 volume percent.
Claim 12
Dependent Claim
61 words
A composite for infrared transmitting applications which comprises a dispersion of diamond particles in a matrix which transmits infrared light, said diamond particles, having a particle size from about 0.01 to 5.0 micrometer diameter, being uniformly dispersed in said matrix comprising an alloy of zinc sulfide and zinc selenide at a concentration of from about 1 to about 75 volume percent.
References Cited (Backward Citations)
USRE29285F1
Cited
USRE29285E
Cited
US4400410A
Cited
US4505746A
Cited
US4461750A
Cited
US4495044A
Cited
US4707384A
Cited
JPS61163275A
Cited
JPS61201698A
Cited
US4655830A
Cited
US4695321A
Cited
US4707312A
Cited
US4816286A
Cited
US4731296A
Cited
US4939043A
Cited
JPS6456401A
Cited
JPS6461397A
Cited
US4844988A
Cited
US4925701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-02-02 | 1996-08-03 | 1997-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-02 | 2000-08-03 | 2001-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-02 | 2004-08-03 | 2005-02-02 | $7700.00 | Window Closed / Lapsed |