US2662885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antihistamine compounds
Assignee: Haarmann & Reimer Chem Fab Zu
•
Filing: 1950-09-19
•
Granted: 1953-12-15
•
Expires: 1970-09-19
Abstract
No abstract record available.
Inventors
- 👤 Schuler Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:07
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
THE PROCESS WHICH COMPRISES REACTING, IN THE PRESENCE OF A CONDENSING AGENT, A SECONDARY AMINE OF THE FORMULA
Claim 2
Dependent Claim
18 words
THE PROCESS WHICH COMPRISES REACTING, IN THE PRESENCE OF A CONDENSING AGENT, A SECONDARY AMINE OF THE FORMULA
References Cited (Backward Citations)
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Cited
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Cited
US2213977A
Cited
US2419230A
Cited
US2433688A
Cited
US2502151A
Cited
US2505133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |