US4443608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
(+),(-)-Tropicamide O-β-B-glucuronic acid, its diastereomers, and salts thereof
Assignee: Repligen Corp
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Filing: 1982-05-24
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Granted: 1984-04-17
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Expires: 2002-05-24
Abstract
Abstract An in vitro enzymatic process which efficiently converts (+,-)-tropicamide to essentially pure (+), (-)-tropicamide O-β-D-glucuronide. This product is then separated, advantageously, into the novel compounds (+)-tropicamide O-β-D-glucuronide and (-)-tropicamide O-β-D-glucuronide. The products disclosed herein absorb ultraviolet light, and, thus, can be incorporated into suitable plastic films which are then useful for screening out harmful ultraviolet radiation for the protection of packaged goods. Also the products can be used to protect the skin against burning by sunlight.
Inventors
- 👤 Walter C. Herlihy
- 👤 Thomas H. Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:25
CPC Classifications
C; C07; C07H; C07H7/00; C07H7/02; C07H15/00; C07H15/26; C12; C12P; C12P19/00; C12P19/44
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
13 words
(+),(-)-Tropicamide O-β-D-glucuronic acid in its essentially pure form, and base addition salts thereof.
Claim 2
Dependent Claim
13 words
(+),(-)-Tropicamide O-β-D-glucuronic acid in its essentially pure form, and base addition salts thereof.
Claim 3
Dependent Claim
8 words
(+)-Tropicamide O-β-D-glucuronic acid, and base addition salts thereof.
Claim 4
Dependent Claim
8 words
(+)-Tropicamide O-β-D-glucuronic acid, and base addition salts thereof.
Claim 5
Dependent Claim
8 words
(-)-Tropicamide O-β-D-glucuronic acid, and base addition salts thereof.
Claim 6
Dependent Claim
8 words
(-)-Tropicamide O-β-D-glucuronic acid, and base addition salts thereof.
Claim 7
Dependent Claim
7 words
The ammonium salt, according to claim 1.
Claim 8
Dependent Claim
7 words
The ammonium salt, according to claim 2.
Claim 9
Dependent Claim
7 words
The ammonium salt, according to claim 3.
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) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |