Patent US3268512A successfully refreshed from Google Patents.
US3268512A
Expired / Lapsed
US
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Reaction of cyanogen azide with benzenoid compounds and selected azepines made thereby
Assignee: EIDP Inc
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Filing: 1964-07-17
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Granted: 1966-08-23
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Expires: 1984-07-17
Abstract
No abstract record available.
Inventors
- 👤 Marsh Frank Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:29
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/38; C01; C01C; C01C3/00; C07; C07C; C07C7/00; C07C7/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
22 words
THE PROCESS WHICH COMPRISES REACTING CYANOGEN AZIDE WITH A BENZENOID COMPOUND FREE OF NONAROMATIC UNSATURATION AT A TEMPERATURE IN THE RANGE 35-150*C.
Claim 2
Dependent Claim
22 words
THE PROCESS WHICH COMPRISES REACTING CYANOGEN AZIDE WITH A BENZENOID COMPOUND FREE OF NONAROMATIC UNSATURATION AT A TEMPERATURE IN THE RANGE 35-150*C.
Claim 3
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 4
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |