Patent US4009300A successfully refreshed from Google Patents.
US4009300A
Expired / Lapsed
US
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Preparation of graded composition protective coatings
Assignee: Honeywell Inc
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Filing: 1974-10-16
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Granted: 1977-02-22
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Expires: 1994-10-16
Abstract
Abstract Graded composition protective layers are prepared for water soluble optical elements. The two materials forming the graded composition protective layer are vapor deposited in the presence of a third vapor which does not react or co-deposit with the two materials. The third vapor inhibits decomposition of one of the two materials by reducing the vapor temperature of the other material.
Inventors
- 👤 John H. Chaffin, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:54
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/02; C23C14/027; C23C14/06; C23C14/0694; G02B1/105; G; G02; G02B; G02B1/00; G02B1/10; G02B1/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
124 words
In a method of vapor depositing an optical coating which is an alloy of at least a first and a second halide compound material, and wherein the vapor temperature of the first material is high enough to cause decomposition of the second material, the improvement comprising: vapor depositing the first and second materials in the presence of a third vapor which does not chemically react or co-deposit with the first and second materials; wherein the third vapor is present in an amount sufficient to cause, as a result of collisions between the vapor of the first material and the third vapor, a reduction in the vapor temperature of the first material to a temperature which will not cause substantial decomposition of the second material.
Claim 2
Dependent Claim
124 words
In a method of vapor depositing an optical coating which is an alloy of at least a first and a second halide compound material, and wherein the vapor temperature of the first material is high enough to cause decomposition of the second material, the improvement comprising: vapor depositing the first and second materials in the presence of a third vapor which does not chemically react or co-deposit with the first and second materials; wherein the third vapor is present in an amount sufficient to cause, as a result of collisions between the vapor of the first material and the third vapor, a reduction in the vapor temperature of the first material to a temperature which will not cause substantial decomposition of the second material.
Claim 3
Dependent Claim
11 words
The invention of claim 1 wherein the first material is KCl.
Claim 4
Dependent Claim
11 words
The invention of claim 2 wherein the second material is TlI.
Claim 5
Dependent Claim
11 words
The invention of claim 3 wherein the third vapor is argon.
Claim 6
Dependent Claim
25 words
The invention of claim 4 wherein the argon has a vapor pressure of between about 1×10 - 4 torr and about 6×10 - 4 torr.
Claim 7
Independent Claim
131 words
A method of preparing a protective coating for an optical element of a first, water soluble halide material, the method comprising: vapor depositing the first material and a second, water insoluble halide material in the presence of a third vapor which does not react or co-deposit with the first and second materials; wherein the vapor temperature of the first material, in the absence of the third vapor, is sufficient to cause decomposition of the second material, and wherein the third vapor is present in an amount sufficient to inhibit decomposition of the second material by reducing the vapor temperature of the first material; and decreasing the amount of the first material being deposited while increasing the amount of the second material being deposited until only the second material is being deposited.
Claim 8
Independent Claim
131 words
A method of preparing a protective coating for an optical element of a first, water soluble halide material, the method comprising: vapor depositing the first material and a second, water insoluble halide material in the presence of a third vapor which does not react or co-deposit with the first and second materials; wherein the vapor temperature of the first material, in the absence of the third vapor, is sufficient to cause decomposition of the second material, and wherein the third vapor is present in an amount sufficient to inhibit decomposition of the second material by reducing the vapor temperature of the first material; and decreasing the amount of the first material being deposited while increasing the amount of the second material being deposited until only the second material is being deposited.
Claim 9
Dependent Claim
12 words
The method of claim 6 wherein the second material is thallium iodide.
Claim 10
Dependent Claim
20 words
The method of claim 7 wherein the first material is of the group consisting of alkali halides and alloys thereof.
Claim 11
Dependent Claim
12 words
The method of claim 8 wherein the first material is potassium chloride.
Claim 12
Dependent Claim
11 words
The method of claim 9 wherein the third vapor is argon.
Claim 13
Dependent Claim
24 words
The method of claim 10 wherein the argon has a vapor pressure of between 1×10 - 4 torr and about 6×10 - 4 torr.
References Cited (Backward Citations)
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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) | 1980-02-22 | 1980-08-23 | 1981-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-22 | 1984-08-23 | 1985-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-22 | 1988-08-23 | 1989-02-22 | $7700.00 | Window Closed / Lapsed |