Patent US3029274A successfully refreshed from Google Patents.
US3029274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkamine esters of amino salicylic acid
Assignee: Rheinpreussen AG fuer Bergbau und Chemie
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Filing: 1955-05-23
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Granted: 1962-04-10
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Expires: 1975-05-23
Abstract
No abstract record available.
Inventors
- 👤 Grimme Walter
- 👤 Schmitz Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:23
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
AN ACID ADDITION SALT OF 2-DIETHYLAMINOETHYL 4-AMINO2-HYDROXYBENZOATE.
Claim 2
Dependent Claim
7 words
AN ACID ADDITION SALT OF 2-DIETHYLAMINOETHYL 4-AMINO2-HYDROXYBENZOATE.
References Cited (Backward Citations)
BE498859A
Cited
US749982A
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US820830A
Cited
US1676470A
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US2251996A
Cited
GB722885A
Cited
GB722886A
Cited
DE842944C
Cited
US2727039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |