US3595930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anionic addition of diarylmethanes to hydrocarbons
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1965-06-01
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Granted: 1971-07-27
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Expires: 1985-06-01
Abstract
Abstract A METHOD OF EFFECTING THE ANIONIC ADDITION OF WEAKLY ACIDIC NUCLEOPHILIC MOLECULES WITH HYDROCARBON SUBSTRATES IN THE PRESENCE OF A BASIC CATALYST BY USE OF ALKYL PHOSPHORAMIDE AND TETRAALKYL UREA SOLVENTS.
Inventors
- 👤 John E Hofmann
- 👤 Alan Schriesheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:17
CPC Classifications
C; C07; C07C; C07C255/00; C07C2/00; C07C2/54; C07C2/72; C07C45/00; C07C45/51; C07C45/511; C07C45/512; C07C45/61; C07C45/67; C07C45/68; C07C49/00; C07C49/385; C07C49/403; C07C51/00; C07C51/08; C07C2523/00; C07C2523/02; C07C2523/04; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/24; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/942
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |