US3035055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methylene diurea
Assignee: —
•
Filing: —
•
Granted: 1962-05-15
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Expires: 1979-05-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:52
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE METHOD OF PREPARING 2,4-DIOXOHEXAHYDRO-1.3.5 TRIAZOINE WHICH COMPRISES HEATING TOGETHER WITH AGITATION AT SUBSTANTIALLY ATMOSPHERIC PRESSURE A MIXTURE OF 1 PART OF METHYLANE DIUREA AND 1 TO 5 PARTS OF MONNONITROBENZENE AT A TEMPERATURE OF ABOUT 200* C. TO 230* C. UNTIL EVOLUTION OF AMMONIA CEASES, COOLING THE RESULTING MIXTURE TO ROOM TEMPERATURE, SEPARATING THE SOLID PRODUCT, TREATING SAID PRODUCT WITH A SOLVENT FOR NITROBENZENE, SEPARATING A SOLID CRUDE PRODUCT THEREFROM, EXTRACTING 2.4-DIOXOHEXANHYDRO-1,3,5-TRIAZINE FROM SAID SOLID WITH BOILING WATER, CONCENTRATING THE AQUEOUS EXTRACT AND PRECIPITATATING THE DESIRED 2,4-DIOXOHEXAHYDRO-1,3,5-TRIAZINE THEREFROM.
Claim 2
Independent Claim
89 words
THE METHOD OF PREPARING 2,4-DIOXOHEXAHYDRO-1.3.5 TRIAZOINE WHICH COMPRISES HEATING TOGETHER WITH AGITATION AT SUBSTANTIALLY ATMOSPHERIC PRESSURE A MIXTURE OF 1 PART OF METHYLANE DIUREA AND 1 TO 5 PARTS OF MONNONITROBENZENE AT A TEMPERATURE OF ABOUT 200* C. TO 230* C. UNTIL EVOLUTION OF AMMONIA CEASES, COOLING THE RESULTING MIXTURE TO ROOM TEMPERATURE, SEPARATING THE SOLID PRODUCT, TREATING SAID PRODUCT WITH A SOLVENT FOR NITROBENZENE, SEPARATING A SOLID CRUDE PRODUCT THEREFROM, EXTRACTING 2.4-DIOXOHEXANHYDRO-1,3,5-TRIAZINE FROM SAID SOLID WITH BOILING WATER, CONCENTRATING THE AQUEOUS EXTRACT AND PRECIPITATATING THE DESIRED 2,4-DIOXOHEXAHYDRO-1,3,5-TRIAZINE THEREFROM.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |