Patent US3090786A successfully refreshed from Google Patents.
US3090786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of nitrosamines
Assignee: Hercules Powder Co
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Filing: 1954-11-05
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Granted: 1963-05-21
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Expires: 1974-11-05
Abstract
No abstract record available.
Inventors
- 👤 Levering Dewey Robert
- 👤 Lucien G Maury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:57
CPC Classifications
C; C08; C08L; C08L21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
IN THE NITROSATION OF A SECONDARY AMINE, THE IMPROVEMENT COMPRISING REACTING NITRIC OXIDE WITH SAID SECONDARY AMINE AS THE NITROSATING AGENT THEREFOR AT A PRESSURE OF AT LEAST 20 P.S.I.
Claim 2
Dependent Claim
30 words
IN THE NITROSATION OF A SECONDARY AMINE, THE IMPROVEMENT COMPRISING REACTING NITRIC OXIDE WITH SAID SECONDARY AMINE AS THE NITROSATING AGENT THEREFOR AT A PRESSURE OF AT LEAST 20 P.S.I.
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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |