Patent US4069168A successfully refreshed from Google Patents.
US4069168A
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Tungsten hexacarbonyl in plastic lenses
Assignee: PPG Industries Inc
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Filing: 1976-10-01
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Granted: 1978-01-17
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Expires: 1996-10-01
Abstract
Abstract Tungsten hexacarbonyl acts as a photochromic agent and an infrared absorber when incorporated in liquid allyl glycol carbonates, such as allyl diglycol carbonate, and polymerizates thereof. Photochromic, infrared-absorbing optical and ophthalmic lenses containing tungsten derived from tungsten hexacarbonyl are made.
Inventors
- 👤 I. Roger Leatherman
- 👤 Michael S. Misura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:08
CPC Classifications
C; C09; C09K; C09K9/00; C09K9/02; G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/23; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/735
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
33 words
A liquid composition comprising a mixture of allyl glycol carbonate monomer and sufficient tungsten hexacarbonyl to provide a photochromic polymerizate that become blue and has substantial infrared absorbance upon exposure to ultraviolet radiation.
Claim 2
Dependent Claim
33 words
A liquid composition comprising a mixture of allyl glycol carbonate monomer and sufficient tungsten hexacarbonyl to provide a photochromic polymerizate that become blue and has substantial infrared absorbance upon exposure to ultraviolet radiation.
Claim 3
Dependent Claim
13 words
The composition of claim 1, wherein the monomer is diethylene glycol bis(allyl carbonate).
Claim 4
Dependent Claim
26 words
The composition of claim 2, wherein the tungsten hexacarbonyl is present in a concentration of between about 0.1 and 0.5 percent by weight of the monomer.
Claim 5
Dependent Claim
22 words
A composition prepared by exposing composition of claim 1 to ultraviolet radiation until gas is evolved and then degassing the exposed composition.
Claim 6
Dependent Claim
28 words
A solid poly(ally glycol carbonate) photochromic polymerizate article having tungsten hexacarbonyl uniformly incorporated therein, said article becoming blue and having substantial infrared absorbance upon exposure to ultraviolet radiation.
Claim 7
Dependent Claim
28 words
A solid poly(ally glycol carbonate) photochromic polymerizate article having tungsten hexacarbonyl uniformly incorporated therein, said article becoming blue and having substantial infrared absorbance upon exposure to ultraviolet radiation.
Claim 8
Dependent Claim
18 words
The poly(allyl glycol carbonate) article of claim 5, wherein the allyl glycol carbonate is diethylene glycol bis(allyl carbonate).
Claim 9
Dependent Claim
29 words
The poly(allyl glycol carbonate) article of claim 6, having a tungsten content of between about 0.1 and 0.5 percent by weight of poly(allyl glycol carbonate), calculated as tungsten hexacarbonyl.
Claim 10
Dependent Claim
31 words
A solid poly(allyl glycol carbonate) article having a photochromic quantity of tungsten hexacarbonyl incorporated in its surface, said article turning blue and having substantial infrared absorbance upon exposure to ultraviolet radiation.
Claim 11
Dependent Claim
31 words
A solid poly(allyl glycol carbonate) article having a photochromic quantity of tungsten hexacarbonyl incorporated in its surface, said article turning blue and having substantial infrared absorbance upon exposure to ultraviolet radiation.
Claim 12
Dependent Claim
15 words
The article of claim 8 wherein the allyl glycol carbonate is diethylene glycol bis(allyl carbonate).
Claim 13
Independent Claim
51 words
A method of making a photochromic article which comprises: adding a photochromic amount of tungsten hexacarbonyl to a liquid allyl glycerol carbonate monomer to form a mixture, and polymerizing the mixture to form a solid photochromic polymerizate article which turns blue and has substantial infrared absorbance upon exposure to ultraviolet radiation.
Claim 14
Independent Claim
51 words
A method of making a photochromic article which comprises: adding a photochromic amount of tungsten hexacarbonyl to a liquid allyl glycerol carbonate monomer to form a mixture, and polymerizing the mixture to form a solid photochromic polymerizate article which turns blue and has substantial infrared absorbance upon exposure to ultraviolet radiation.
Claim 15
Dependent Claim
33 words
The method of claim 10, wherein the monomer is diethylene glycol bis(allyl carbonate) and the tungsten hexacarbonyl is added in a concentration of between about 0.1 and 0.5 percent by weight of monomer.
Claim 16
Dependent Claim
27 words
The method of claim 11, wherein polymerization is effected by adding an organic peroxide initiator to the mixture and heating the mixture to form a solid polymerizate.
Claim 17
Independent Claim
59 words
A method of making a photochromic article which turns blue and has substantial infrared absorbance upon exposure to ultraviolet radiation, which method comprises soaking a poly(allyl glycol carbonate) article in a heated solution of tungsten hexacarbonyl in an organic solvent whereby to deposit a photochromic amount of tungsten hexacarbonyl in said article and removing the solvent from the article.
Claim 18
Independent Claim
59 words
A method of making a photochromic article which turns blue and has substantial infrared absorbance upon exposure to ultraviolet radiation, which method comprises soaking a poly(allyl glycol carbonate) article in a heated solution of tungsten hexacarbonyl in an organic solvent whereby to deposit a photochromic amount of tungsten hexacarbonyl in said article and removing the solvent from the article.
Claim 19
Independent Claim
45 words
A method of making a photochromic article which comprises: adding from about 0.1 to about 0.5 weight percent tungsten hexacarbonyl to a liquid allyl glycerol carbonate monomer, basis weight of the monomer, to form a mixture, and polymerizing the mixture to form a solid article.
Claim 20
Independent Claim
45 words
A method of making a photochromic article which comprises: adding from about 0.1 to about 0.5 weight percent tungsten hexacarbonyl to a liquid allyl glycerol carbonate monomer, basis weight of the monomer, to form a mixture, and polymerizing the mixture to form a solid article.
Claim 21
Dependent Claim
27 words
The method of claim 14, wherein polymerization is effected by adding an organic peroxide initiator to the mixture and heating the mixture to form a solid polymerizate.
References Cited (Backward Citations)
US2403113A
Cited
US3222432A
Cited
US3293037A
Cited
US3317321A
Cited
US3397059A
Cited
US3576755A
Cited
US3355294A
Cited
US3475339A
Cited
US3692688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |