Patent US2814648A successfully refreshed from Google Patents.
US2814648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 1, 4-bis (trichloromethyl)-2, 5-dichlorobenzene
Assignee: Glanzstoff AG
•
Filing: 1953-08-24
•
Granted: 1957-11-26
•
Expires: 1973-08-24
Abstract
No abstract record available.
Inventors
- 👤 Heisenberg Erwin
- 👤 Lotz Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:02
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26; C07C17/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
THE METHOD OF PREPARING 1,4-BIC(TRICHLOROMETHYL)2,5-DICHLOROBENZENE WHICH COMPRISES CAUSING BENZENE,, FORMALDEHYDE AND GASEOUS CHLORINE TO REACT WITH ONE ANOTHER AT A TEMPERATURE RANGING FROM ABOUT 20 TO ABOUT 80* C., IN THE PRESENCE OF ZINC CHLORIDE AND WATER,THE AMOUNT, PER MOL OF BENZENE, OF FORMALDEHYDE RANGING ABOUT FROM ONE TO SIX MOLS, AND OF ZINC CHLORIDE FROM ONE TO TWO MOLS.
Claim 2
Independent Claim
60 words
THE METHOD OF PREPARING 1,4-BIC(TRICHLOROMETHYL)2,5-DICHLOROBENZENE WHICH COMPRISES CAUSING BENZENE,, FORMALDEHYDE AND GASEOUS CHLORINE TO REACT WITH ONE ANOTHER AT A TEMPERATURE RANGING FROM ABOUT 20 TO ABOUT 80* C., IN THE PRESENCE OF ZINC CHLORIDE AND WATER,THE AMOUNT, PER MOL OF BENZENE, OF FORMALDEHYDE RANGING ABOUT FROM ONE TO SIX MOLS, AND OF ZINC CHLORIDE FROM ONE TO TWO MOLS.
References Cited (Backward Citations)
CH141752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |