Patent US3567898A successfully refreshed from Google Patents.
Patent US2695223A successfully refreshed from Google Patents.
US2695223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace oils containing organic phosphorus compounds
Assignee: Standard Oil Co
•
Filing: 1949-11-17
•
Granted: 1954-11-23
•
Expires: 1969-11-17
Abstract
No abstract record available.
Inventors
- 👤 John D Bartleson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:59
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C10L1/2608; C10L1/2616; C10L1/2633; C10L1/2641; C10L1/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A COMPOSITION CONSISTING ESSENTIALLY OF A CRACKED FURNACE OIL OF VISCOSITY SUITABLE FOR BURNING IN A VAPORIZING POT-TYPE BURNER AND HAVING A NORMAL TENDENCY TO FORM A CARBON DEPOSIT IN THE POT OF THE BURNER, IN COMBINATION WITH AN AMOUNT OF AN OIL DISPERSABLE ORGANIC PHOSPHORUS COMPOUND FREE OF METAL ATOMS AND HAVING A BOILING POINT OF AT LEAST 400* F., SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF PHOSPHINES, PHOSPHINATES, PHOSPHONATES, PHOSPHORIC ACID ESTERS, THIOPHINATES AND THIOMETAPHOSPHATES TO PROVIDE NOT OVER 0.015 WEIGHT PER CENT OF COMBINED PHOSPHORUS IN THE OIL, WHEREBY THE PRESENCE OF SAID PHOSPHORUS COMPOUND IMPROVES THE BURNING PERFORMANCE OF THE OIL AND MINIMIZES THE CARBON DEPOSIT TO THE CRACKED CHARACTERISTIC OF THE OIL.
Claim 2
Dependent Claim
119 words
A COMPOSITION CONSISTING ESSENTIALLY OF A CRACKED FURNACE OIL OF VISCOSITY SUITABLE FOR BURNING IN A VAPORIZING POT-TYPE BURNER AND HAVING A NORMAL TENDENCY TO FORM A CARBON DEPOSIT IN THE POT OF THE BURNER, IN COMBINATION WITH AN AMOUNT OF AN OIL DISPERSABLE ORGANIC PHOSPHORUS COMPOUND FREE OF METAL ATOMS AND HAVING A BOILING POINT OF AT LEAST 400* F., SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF PHOSPHINES, PHOSPHINATES, PHOSPHONATES, PHOSPHORIC ACID ESTERS, THIOPHINATES AND THIOMETAPHOSPHATES TO PROVIDE NOT OVER 0.015 WEIGHT PER CENT OF COMBINED PHOSPHORUS IN THE OIL, WHEREBY THE PRESENCE OF SAID PHOSPHORUS COMPOUND IMPROVES THE BURNING PERFORMANCE OF THE OIL AND MINIMIZES THE CARBON DEPOSIT TO THE CRACKED CHARACTERISTIC OF THE OIL.
References Cited (Backward Citations)
GB496692A
Cited
US2137727A
Cited
US2261290A
Cited
US2301370A
Cited
US2368866A
Cited
US2382905A
Cited
US2560542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |