US3704108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroconversion of waste natural and synthetic rubbers
Assignee: Hydrocarbon Research Inc
•
Filing: 1970-09-25
•
Granted: 1972-11-28
•
Expires: 1990-09-25
Abstract
Abstract WASTE NATURAL AND SYNTHETIC RUBBERS ARE CONVERTED IN THE PRESENCE OF A CATALYST AND IN A HYDROGEN ENVIRONMENT BY PASSING A PARTICULATE RUBBER SLURRY AND HYDROGEN UPWARDLY THROUGH A REACTOR MAINTAINED UNDER TEMPERATURES IN THE 700 TO 850* F. RANGE AND PRESSURES IN THE 500 TO 3000 P.S.I.G. RANGE. THE PARTICULATE RUBBER IS CONVERTED IN THE REACTOR TO HYDROCARBON LIQUIDS WHILE UNCONVERTIBLE SOLIDS ORIGINALLY COMPOUNDED WITH THE RUBBER LEAVE UNCHANGED IN THE PRODUCT. THE HYDROCARBON STREAM CAN HAVE A WIDE RANGE OF PROPERTIES DEPENDING ON THE OBJECTIVES OF THE USER OF THE PROCESS.
Inventors
- 👤 Seymour B Alpert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:50
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |