Patent US2920050A successfully refreshed from Google Patents.
US2920050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Whetlerite product and process
Assignee: Individual
•
Filing: 1943-12-30
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Granted: 1960-01-05
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Expires: 1963-12-30
Abstract
No abstract record available.
Inventors
- 👤 Francis E Blacet
- 👤 Robert J Grabenstetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:47
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS OF PREPARING AN ABSORBENT FOR REMOVING POISONOUS CONTAMINANTS, INCLUDING CYANOGEN CHLORIDE AND ARSINE, FROM AIR OR OTHER GAS CONTAINING THE SAME WHICH ESSENTIALLY CONSISTS IN IMPREGNATING AN ACTIVATED BASE CHARCOAL WITH A CUPROUS FREE AQUEOUS SOLUTION CONSISTING ESSENTIALLY ONLY OF WATER AND THE FOLLOWING SUBSTANCES DISSOLVED THEREIN IN THE APPROXIMATE PERCENTAGE:
Claim 2
Dependent Claim
53 words
A PROCESS OF PREPARING AN ABSORBENT FOR REMOVING POISONOUS CONTAMINANTS, INCLUDING CYANOGEN CHLORIDE AND ARSINE, FROM AIR OR OTHER GAS CONTAINING THE SAME WHICH ESSENTIALLY CONSISTS IN IMPREGNATING AN ACTIVATED BASE CHARCOAL WITH A CUPROUS FREE AQUEOUS SOLUTION CONSISTING ESSENTIALLY ONLY OF WATER AND THE FOLLOWING SUBSTANCES DISSOLVED THEREIN IN THE APPROXIMATE PERCENTAGE:
References Cited (Backward Citations)
US2212593A
Cited
US701995A
Cited
US1519470A
Cited
US1520437A
Cited
US1771396A
Cited
US1849503A
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US2227672A
Cited
US2511288A
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US2523875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |