Patent US3476802A successfully refreshed from Google Patents.
US3476802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-alkyl derivatives of 3,5-diacetamido-2,4,6-triiodobenzoic acid and salts thereof and process for preparing the same
Assignee: Norgas AS
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Filing: 1960-12-08
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Granted: 1969-11-04
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Expires: 1980-12-08
Abstract
No abstract record available.
Inventors
- 👤 Hugo Holtermann
- 👤 Leif Gunnar Haugen
- 👤 Nils Thorsdalen
- 👤 Knut Tjonneland
- 👤 Knut Wille
- 👤 Jean Koutroulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:41
CPC Classifications
A; A61; A61K; A61K49/00; A61K49/04; A61K49/0433; A61K49/0447; A61K49/0452; C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN ACID OF THE FORMULA
Claim 2
Dependent Claim
13 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AN ACID OF THE FORMULA
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) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |