US4150033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reagent suitable for enzyme immuno assay
Assignee: Sumitomo Pharma Co Ltd
•
Filing: 1976-12-06
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Granted: 1979-04-17
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Expires: 1996-12-06
Abstract
Abstract A novel maleimidobenzoic acid N-hydroxysuccinimide ester of the formula: <IMAGE> (I) which is suitable as a binding agent for binding an enzyme and an antigen to give an enzyme-labeled antigen of the formula: <IMAGE> (II) wherein X and Y are different and are each an enzyme or an antigen, and an enzyme immuno assay using the enzyme-labeled antigen (II) and further a kit for the enzyme immuno assay which contains the enzyme-labeled antigen (II).
Inventors
- 👤 Tsunehiro Kitagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:24
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/44; C07D207/444; C07D207/448; C07D207/452; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/531; G01N33/532; G01N33/535; Y; Y10; Y10S; Y10S435/00; Y10S435/961; Y10S435/964; Y10S435/975; Y10S436/00; Y10S436/807; Y10S436/808
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
9 words
A maleimidobenzoic acid N-hydroxysuccinimide ester of the formula: ##STR15##
Claim 2
Dependent Claim
9 words
A maleimidobenzoic acid N-hydroxysuccinimide ester of the formula: ##STR15##
Claim 3
Dependent Claim
17 words
The compound according to claim 1, wherein the compound is meta-position isomer of the following formula: ##STR16##
References Cited (Backward Citations)
US3770820A
Cited
US3887582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |