US2557993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of removing mineral oil from vegetable fibers
Assignee: Lockport Cotton Batting Co
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Filing: 1948-07-30
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Granted: 1951-06-26
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Expires: 1968-07-30
Abstract
No abstract record available.
Inventors
- 👤 Ralph R Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:37
CPC Classifications
D; D06; D06M; D06M23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PROCESS OF REMOVING MINERAL OIL FROM VEGETABLE FIBERS CONTAMINATED THEREWITH WHICH INCLUDES THE STEPS OF SUBJECTING THE FIBROUS MATERIAL WHILE THE SAME CONTAINS AT LEAST 45% OF WATER BASED ON THE DRY WEIGHT OF THE FIBERS, TO CURRENTS OF AIR HEATED TO TEMPERATURES BETWEEN 120 DEGREES C. AND 160 DEGREES C. TO VOLATILIZE MINERAL OIL AND SOME OF THE WATER OF THE FIBROUS MATERIAL, SAID TREATMENT BEING CONTINUED UNTIL THE WATER CONTENT OF THE FIBROUS MATERIAL IS APPROXIMATELY 30%, THEN SUBJECTING THE FIBROUS MATERIAL TO AIR CURRENTS HEATED TO APPROXIMATELY 90 DEGREES C. TO 120 DEGREES C. UNTIL THE WATER CONTENT OF THE FIBROUS MATERIAL IS REDUCED TO ABOUT 15%, AND THEN FURTHER DRYING THE FIBROUS MATERIAL AT TEMPERATURES WELL BELOW THE BOILING POINT OF WATER TO REDUCE THE MOISTURE CONTENT THEREOF.
Claim 2
Dependent Claim
133 words
A PROCESS OF REMOVING MINERAL OIL FROM VEGETABLE FIBERS CONTAMINATED THEREWITH WHICH INCLUDES THE STEPS OF SUBJECTING THE FIBROUS MATERIAL WHILE THE SAME CONTAINS AT LEAST 45% OF WATER BASED ON THE DRY WEIGHT OF THE FIBERS, TO CURRENTS OF AIR HEATED TO TEMPERATURES BETWEEN 120 DEGREES C. AND 160 DEGREES C. TO VOLATILIZE MINERAL OIL AND SOME OF THE WATER OF THE FIBROUS MATERIAL, SAID TREATMENT BEING CONTINUED UNTIL THE WATER CONTENT OF THE FIBROUS MATERIAL IS APPROXIMATELY 30%, THEN SUBJECTING THE FIBROUS MATERIAL TO AIR CURRENTS HEATED TO APPROXIMATELY 90 DEGREES C. TO 120 DEGREES C. UNTIL THE WATER CONTENT OF THE FIBROUS MATERIAL IS REDUCED TO ABOUT 15%, AND THEN FURTHER DRYING THE FIBROUS MATERIAL AT TEMPERATURES WELL BELOW THE BOILING POINT OF WATER TO REDUCE THE MOISTURE CONTENT THEREOF.
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) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |