US2907798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of tetrahalomethanes
Assignee: Pennwalt Corp
•
Filing: 1957-05-07
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Granted: 1959-10-06
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Expires: 1977-05-07
Abstract
No abstract record available.
Inventors
- 👤 Robert N Haszeldine
- 👤 Iserson Hyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:07
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A METHOD FOR MAKING TETRAHALOMETHANES WHICH COMPRISES REACTING A CARBONYL HALIDE HAVING THE GENERAL FORMULA
Claim 2
Independent Claim
15 words
A METHOD FOR MAKING TETRAHALOMETHANES WHICH COMPRISES REACTING A CARBONYL HALIDE HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2757214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |