Patent US4460772A successfully refreshed from Google Patents.
US4460772A
Expired / Lapsed
US
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6-[N-(ω-Carboxyalkyl)amino]-1,3-dimethyl-5-formamidouracils
Assignee: Bayer Corp
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Filing: 1983-05-11
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Granted: 1984-07-17
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Expires: 2003-05-11
Abstract
Abstract Intermediates in the preparation of 9-position derivatives of theophylline useful in synthesizing theophylline immunogens and labeled conjugates. The labeled conjugates and the antibodies produced against the immunogens are particularly useful in homogeneous nonradioisotopic immunoassay for measuring theophylline in biological fluids such as serum.
Inventors
- 👤 Jeffrey L. Benovic
- 👤 Robert T. Buckler
- 👤 John F. Burd
- 👤 Thomas M. Li
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:24
CPC Classifications
C; C07; C07D; C07D473/00; C07D473/02; C07D473/04; C07D473/06; C07D473/08; C07K; C07K16/00; C07K16/18; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/94; A; A61; A61K; A61K39/00; A61K2039/60; A61K2039/6031; A61K2039/6087; Y; Y10; Y10S; Y10S435/00; Y10S435/961; Y10S530/00; Y10S530/807
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
15 words
A compound of the formula: ##STR20## wherein n is an integer from 1 through 10.
Claim 2
Dependent Claim
15 words
A compound of the formula: ##STR20## wherein n is an integer from 1 through 10.
Claim 3
Dependent Claim
7 words
The compound of claim 1 wherein n=5.
References Cited (Backward Citations)
US2655501A
Cited
US4120947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |