US2820814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyiodinated 5-aminoisophthalic acids, salts, and esters
Assignee: Merck Sharp & Dohme LLC
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Filing: 1955-03-21
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Granted: 1958-01-21
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Expires: 1975-03-21
Abstract
No abstract record available.
Inventors
- 👤 Helen F Ginsberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:11
CPC Classifications
A; A61; A61K; A61K49/00; A61K49/04; A61K49/0433
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A 5-AMINO-POLYIODO-ISOPHTHALIC ACID OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
15 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A 5-AMINO-POLYIODO-ISOPHTHALIC ACID OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2247880A
Cited
US2611786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |