US2799716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying trichloroethylene
Assignee: McGraw Edison Co
•
Filing: 1954-02-08
•
Granted: 1957-07-16
•
Expires: 1974-02-08
Abstract
No abstract record available.
Inventors
- 👤 Berthal D Brummet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:47
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A PROCESS OF PURIFYINNG COMMERICAL GRADE TRICHLOROETHYLENE TO RENDER IT SUITABLE AS AN ANESTHETIC, WHICH CO
Claim 2
Dependent Claim
16 words
A PROCESS OF PURIFYINNG COMMERICAL GRADE TRICHLOROETHYLENE TO RENDER IT SUITABLE AS AN ANESTHETIC, WHICH CO
References Cited (Backward Citations)
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US2252536A
Cited
US2402425A
Cited
US2463601A
Cited
US2456184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |