Patent US2643248A successfully refreshed from Google Patents.
US2643248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sulfurizing terpene hydrocarbons
Assignee: Pure Oil Co
•
Filing: 1950-05-02
•
Granted: 1953-06-23
•
Expires: 1970-05-02
Abstract
No abstract record available.
Inventors
- 👤 Elmer W Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:22
CPC Classifications
C; C07; C07C; C07C321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE METHOD, FOR PREPARING SULFURIZED ISOPRENOID HYDROCARBONS, COMPRISING REACTING SAID ISOPRENOID HYDROCARBONS WITH A SULFURIZING AGENT PRESENT IN AN AMOUNT AT LEAST STOICHIOMETRICALLY EQUIVALENT TO THAT NECESSARY TO REACT WITH SAID ISOPRENOID HYDROCARBONS, AT A TEMPERATURE AT LEAST ABOVE THE MELTING POINT OF SUFUR BUT BELOW THE DECOMPOSITION POINT OF SAID ISOPRENOID HYDROCARBONS, AND PROMOTING SAID REACTION BY THE PRESENCE OF SMALL AMOUNT OF A PROMOTER SELECTED FROM THE GROUP CONSISTING OF LEAD OXIDES, HYDRATED LEAD OXIDES, METALS SALTS OF LEAD ACIDS AND THEIR MIXTURES.
Claim 2
Independent Claim
85 words
THE METHOD, FOR PREPARING SULFURIZED ISOPRENOID HYDROCARBONS, COMPRISING REACTING SAID ISOPRENOID HYDROCARBONS WITH A SULFURIZING AGENT PRESENT IN AN AMOUNT AT LEAST STOICHIOMETRICALLY EQUIVALENT TO THAT NECESSARY TO REACT WITH SAID ISOPRENOID HYDROCARBONS, AT A TEMPERATURE AT LEAST ABOVE THE MELTING POINT OF SUFUR BUT BELOW THE DECOMPOSITION POINT OF SAID ISOPRENOID HYDROCARBONS, AND PROMOTING SAID REACTION BY THE PRESENCE OF SMALL AMOUNT OF A PROMOTER SELECTED FROM THE GROUP CONSISTING OF LEAD OXIDES, HYDRATED LEAD OXIDES, METALS SALTS OF LEAD ACIDS AND THEIR MIXTURES.
References Cited (Backward Citations)
US2291404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |