US2747679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of platinum in catalytic gas reactions
Assignee: WC Heraus GmbH and Co KG
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Filing: 1953-01-23
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Granted: 1956-05-29
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Expires: 1973-01-23
Abstract
No abstract record available.
Inventors
- 👤 Ruthardt Konrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:51
CPC Classifications
C; C22; C22B; C22B11/00; C22B11/02; C22B11/021; C22B11/026; C22B11/028; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN THE RECOVERY OF PLATINUM USED AT LEAST AS A COMPONENT OF A PLATINUM CONTAINING CATALYST IN A CATALYTIC GAS REACTION CARRIED OUT AT ELEVATED TEMPERATURE, THE CONNECTION IN SERIES BEHIND THE CATALYST OF A GAS-PERVIOUS ARRANGEMENT HAVING A SURFACE CONSISTING OF AT LEAST ONE BASE METAL OF THE 4TH AND 5TH GROUPS OF THE PERIODIC SYSTEM WHICH ARE TEMPERATURE-RESISTANT AND RESISTANT TO THE PASSING GASES.
Claim 2
Dependent Claim
66 words
IN THE RECOVERY OF PLATINUM USED AT LEAST AS A COMPONENT OF A PLATINUM CONTAINING CATALYST IN A CATALYTIC GAS REACTION CARRIED OUT AT ELEVATED TEMPERATURE, THE CONNECTION IN SERIES BEHIND THE CATALYST OF A GAS-PERVIOUS ARRANGEMENT HAVING A SURFACE CONSISTING OF AT LEAST ONE BASE METAL OF THE 4TH AND 5TH GROUPS OF THE PERIODIC SYSTEM WHICH ARE TEMPERATURE-RESISTANT AND RESISTANT TO THE PASSING GASES.
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) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |