US3685962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of metal halide catalyst
Assignee: Shell USA Inc
•
Filing: 1970-04-27
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Granted: 1972-08-22
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Expires: 1990-04-27
Abstract
Abstract A PROCESS IS DISCLOSED FOR RECOVERING METAL HALIDE FROM A METAL HALIDE-AMMONIUM HALIDE COMPLEX BY HEATING THE COMPLEX IN A THERMAL DECOMPOSITION ZONE AND PASSING THE RESULTING VAPOR PHASE SERIALLY THROUGH AT LEAST TWO CONDENSING ZONES, THE FIRST CONDENSING ZONE BEING MAINTAINED AT A TEMPERATURE AT WHICH THE HIGHER BOILING OF THE METAL HALIDE AND THE AMMONIUM HALIDE DECOMPOSITION PRODUCTS CONDENSES AND THE LOWER BOILING OF THE TWO IS IN VAPOR PHASE, AND THE SECOND CONDENSING ZONE BEING MAINTAINED AT A TEMPERATURE WHERE THE LOWER BOILING DECOMPOSITION PRODUCT CONDENSES.
Inventors
- 👤 Thomas E Kiovsky
- 👤 Wilfried J Petzny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:40
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; C10G47/08; C10G1/00; C10G1/08; C10G1/086
Claims Analysis
Total Claims: 0
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |