US3130218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of 4-nitrostilbene carbonitriles
Assignee: GAF Chemicals Corp
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Filing: 1961-10-10
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Granted: 1964-04-21
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Expires: 1981-10-10
Abstract
No abstract record available.
Inventors
- 👤 Anthony J Cofrancesco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:06
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/49
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE PROCESS OF PREPARING A 4-NITRO-2-STILBENE CARBONITRILE WHICH COMPRISES CONDENSING AT A TEMPERATURE OF FROM ABOUT 50*C.-150*C. A MONO-CYCLIC AROMATIC ALDEHYDE WITH 5-NITRO-O-TOLUNITRILE IN THE PRESENCE OF FROM ABOUT 0.035 MOLE TO 0.1 MOLE OF HEXAMETHYLENEIMINE PER MOLE OF 5-NITRO-O-TOLUNITRILE.
Claim 2
Dependent Claim
40 words
THE PROCESS OF PREPARING A 4-NITRO-2-STILBENE CARBONITRILE WHICH COMPRISES CONDENSING AT A TEMPERATURE OF FROM ABOUT 50*C.-150*C. A MONO-CYCLIC AROMATIC ALDEHYDE WITH 5-NITRO-O-TOLUNITRILE IN THE PRESENCE OF FROM ABOUT 0.035 MOLE TO 0.1 MOLE OF HEXAMETHYLENEIMINE PER MOLE OF 5-NITRO-O-TOLUNITRILE.
References Cited (Backward Citations)
US2865916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |