US2520901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing a hydroabietylamine
Assignee: Hercules Powder Co
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Filing: 1945-12-18
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Granted: 1950-09-05
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Expires: 1965-12-18
Abstract
No abstract record available.
Inventors
- 👤 Jr George J Benoit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:46
CPC Classifications
C; C09; C09F; C09F1/00; C07; C07C; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
THE PROCESS OF PREPARING A HYDROABIETYLAMINE WHICH COMPRISES CONTACTING HYDROABIETALDEHYDE WITH ANHYDROUS AMMONIA AND HYDROGEN, AT A PRESSURE OF ABOUT 200 TO 8000 POUNDS PER SQUARE INCH, IN THE PRESENCE OF AN ACTIVE HYDROGENATION CATALYST AT A TEMPERATURE OF ABOUT 100*C. TO ABOUT 250*C.
Claim 2
Dependent Claim
44 words
THE PROCESS OF PREPARING A HYDROABIETYLAMINE WHICH COMPRISES CONTACTING HYDROABIETALDEHYDE WITH ANHYDROUS AMMONIA AND HYDROGEN, AT A PRESSURE OF ABOUT 200 TO 8000 POUNDS PER SQUARE INCH, IN THE PRESENCE OF AN ACTIVE HYDROGENATION CATALYST AT A TEMPERATURE OF ABOUT 100*C. TO ABOUT 250*C.
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) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |