US2835711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of fluorocarbons and chlorofluorocarbons
Assignee: General Electric Co
•
Filing: 1955-07-18
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Granted: 1958-05-20
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Expires: 1975-07-18
Abstract
No abstract record available.
Inventors
- 👤 John K Wolfe
- 👤 Newell C Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:06
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/007; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/943
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A METHOD OF PREPARING A MATERIAL SELECTED FROM THE CLASS CONSISTING OF FLUOROCARBONS AND CHLOROFLUOROCARBONS WHICH COMPRISES REACTING CARBON AT HIGH TEMPERATURE WITH A MATERIAL SELECTED FROM THE CLASS CONSISTING OF CALCIUM FLUORIDE AND A MIXTURE OF CALCIUM FLUORIDE AND CALCIUM.
Claim 2
Independent Claim
41 words
A METHOD OF PREPARING A MATERIAL SELECTED FROM THE CLASS CONSISTING OF FLUOROCARBONS AND CHLOROFLUOROCARBONS WHICH COMPRISES REACTING CARBON AT HIGH TEMPERATURE WITH A MATERIAL SELECTED FROM THE CLASS CONSISTING OF CALCIUM FLUORIDE AND A MIXTURE OF CALCIUM FLUORIDE AND CALCIUM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |