Patent US4215010A successfully refreshed from Google Patents.
US4215010A
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Photochromic compounds
Assignee: American Optical Corp
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Filing: 1978-09-08
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Granted: 1980-07-29
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Expires: 1998-09-08
Abstract
Abstract Photochromic compounds of the formula <IMAGE> wherein one of R1 and R2 is halogen or lower alkoxy, and the other is hydrogen, and R3 and R4 are hydrogen, lower alkyl, lower alkoxy, or halogen and their use in lenses are disclosed.
Inventors
- 👤 Richard J. Hovey
- 👤 Nori Y. C. Chu
- 👤 Peter G. Piusz
- 👤 Charles H. Fuchsman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:38
CPC Classifications
C; C07; C07D; C07D498/00; C07D498/02; C07D498/10; G; G02; G02C; G02C7/00; G02C7/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
38 words
A compound having the formula; ##STR3## wherein one of R 1 and R 2 is halogen or lower alkoxy, and the other is hydrogen, and R 3 and R 4 are hydrogen, lower alkyl, lower alkoxy, or halogen.
Claim 2
Dependent Claim
38 words
A compound having the formula; ##STR3## wherein one of R 1 and R 2 is halogen or lower alkoxy, and the other is hydrogen, and R 3 and R 4 are hydrogen, lower alkyl, lower alkoxy, or halogen.
Claim 3
Dependent Claim
11 words
The compound according to claim 1 wherein R 1 is hydrogen.
Claim 4
Dependent Claim
11 words
The compound according to claim 1 wherein R 2 is hydrogen.
Claim 5
Dependent Claim
11 words
The compound according to claim 1 wherein R 1 is methoxy.
Claim 6
Dependent Claim
11 words
The compound according to claim 1 wherein R 3 is hydrogen.
Claim 7
Dependent Claim
14 words
The compound according to claim 1 wherein R 3 and R 4 are methyl.
Claim 8
Dependent Claim
11 words
The compound according to claim 1 wherein R 2 is halogen.
Claim 9
Dependent Claim
11 words
The compound according to claim 6 wherein R 1 is methoxy.
Claim 10
Dependent Claim
11 words
The compound according to claim 6 wherein R 2 is halogen.
Claim 11
Dependent Claim
43 words
A photochromic optical element comprising, (A) a transparent plastic host and (B) an effective amount of photochromic compound selected from the group consisting of 1,3,3-trimethyl-9'-methoxy-; 1,3,3-trimethyl-9'-ethoxy-; 1,3,3-trimethyl-8'-bromo-; 1,3,3,5-tetramethyl-9'-methoxy-; 1,3,3,6-tetramethyl-9'-methoxy-; 1,3,3,7-tetramethyl-9'-methoxy-; 1,3,3,4,5-pentamethyl-9'-methoxy; 1,3,3,5,6-pentamethyl-9'-methoxy-; 1,3,3,4,7-pentamethyl-9'-methoxy-; 1,3,3,5,7-pentamethyl-9'-methoxy-; 1,3,3,6,7-pentamethyl-9'-methoxy-; 1,3,3-trimethyl-5,9'-dimethoxy-; 1,3,3-trimethyl-4,7,9'-trimethoxy-; 1,3,3-trimethyl-5-chloro-9'-methoxy-; 1,3,3,4,5-pentamethyl-8'-bromo-; 1,3,3,5,6-pentamethyl-8'-bromo-spiroindolinenaphthooximes and mixtures thereof.
Claim 12
Dependent Claim
43 words
A photochromic optical element comprising, (A) a transparent plastic host and (B) an effective amount of photochromic compound selected from the group consisting of 1,3,3-trimethyl-9'-methoxy-; 1,3,3-trimethyl-9'-ethoxy-; 1,3,3-trimethyl-8'-bromo-; 1,3,3,5-tetramethyl-9'-methoxy-; 1,3,3,6-tetramethyl-9'-methoxy-; 1,3,3,7-tetramethyl-9'-methoxy-; 1,3,3,4,5-pentamethyl-9'-methoxy; 1,3,3,5,6-pentamethyl-9'-methoxy-; 1,3,3,4,7-pentamethyl-9'-methoxy-; 1,3,3,5,7-pentamethyl-9'-methoxy-; 1,3,3,6,7-pentamethyl-9'-methoxy-; 1,3,3-trimethyl-5,9'-dimethoxy-; 1,3,3-trimethyl-4,7,9'-trimethoxy-; 1,3,3-trimethyl-5-chloro-9'-methoxy-; 1,3,3,4,5-pentamethyl-8'-bromo-; 1,3,3,5,6-pentamethyl-8'-bromo-spiroindolinenaphthooximes and mixtures thereof.
Claim 13
Dependent Claim
20 words
The photochromic optical element according to claim 10 wherein the element is a lens and the host is polycarbonate resin.
Claim 14
Dependent Claim
22 words
The photochromic optical element according to claim 10 wherein the element is an ophthalmic lens and the host is poly(allyl diglycol carbonate).
Claim 15
Dependent Claim
20 words
The element according to claim 10 wherein the element is an ophthalmic lens and the host is cellulose acetate butyrate.
Claim 16
Dependent Claim
20 words
The element according to claim 10 wherein the element is an ophthalmic lens and the host is cellulose acetate propionate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |