US3067252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 2, 3-diazabuta-1, 3-diene
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1959-05-15
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Granted: 1962-12-04
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Expires: 1979-05-15
Abstract
No abstract record available.
Inventors
- 👤 Norman P Neureiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:03
CPC Classifications
C; C07; C07C; C07C251/00; C07C251/72; C07C251/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD FOR PREPARING 2,3-DIAZABUTA-1,3-DIENE WHICH COMPRISES REACTING FORMALDEHYDE WITH HYDRAZINE TO OBTAIN A WHITE POLYMER, HEATING THE POLYMER UNDER A PRESSURE SUBSTANTIALLY LESS THAN ATMOSPHERIC TO A TEMPERATURE IN THE RANGE FROM ABOUT 300* TO ABOUT 550*C. IN THE PRESENCE OF AN INERT GAS TO FORM 2,3-DIAZABUTA-1,3DIENE, AND RECOVERING SAID 2,3-DIAZABUTA-1,3-DIENE AS A PRODUCT AT A TEMPERATURE BELOW ABOUT -40*C.
Claim 2
Independent Claim
61 words
A METHOD FOR PREPARING 2,3-DIAZABUTA-1,3-DIENE WHICH COMPRISES REACTING FORMALDEHYDE WITH HYDRAZINE TO OBTAIN A WHITE POLYMER, HEATING THE POLYMER UNDER A PRESSURE SUBSTANTIALLY LESS THAN ATMOSPHERIC TO A TEMPERATURE IN THE RANGE FROM ABOUT 300* TO ABOUT 550*C. IN THE PRESENCE OF AN INERT GAS TO FORM 2,3-DIAZABUTA-1,3DIENE, AND RECOVERING SAID 2,3-DIAZABUTA-1,3-DIENE AS A PRODUCT AT A TEMPERATURE BELOW ABOUT -40*C.
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) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |