Patent US4216142A successfully refreshed from Google Patents.
US4216142A
Expired / Lapsed
US
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Chromogenic substrates for the proteolytic enzymes
Assignee: Abbott Laboratories
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Filing: 1978-12-18
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Granted: 1980-08-05
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Expires: 1998-12-18
Abstract
Abstract The present invention encompasses a compound of the formula ##STR1## and the biologically acceptable acid addition salts thereof wherein R is hydrogen, tosyl, carbobenzoxy or benzoyl. These compounds are chromogenic substrates for proteolytic enzymes useful in antithrombin III determination.
Inventors
- 👤 Akhtar Ali
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:02
CPC Classifications
C; C07; C07K; C07K5/00; C07K5/04; C07K5/08; C07K5/0802; C07K5/0804; C07K5/0806; C12; C12Q; C12Q1/00; C12Q1/34; C12Q1/37; Y; Y10; Y10S; Y10S530/00; Y10S530/802
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A compound which is ##STR5## and the hydrochloride salt thereof.
Claim 2
Dependent Claim
10 words
A compound which is ##STR5## and the hydrochloride salt thereof.
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) | 1983-08-05 | 1984-02-04 | 1984-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-05 | 1988-02-04 | 1988-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-05 | 1992-02-04 | 1992-08-05 | $7700.00 | Window Closed / Lapsed |