US2612434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent for purifying air
Assignee: Individual
•
Filing: 1938-04-25
•
Granted: 1952-09-30
•
Expires: 1958-04-25
Abstract
No abstract record available.
Inventors
- 👤 Paul O Rockwell
- 👤 John C Goshorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:45
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01J; B01J20/00; B01J20/02; B01J20/20; C; C01; C01C; C01C3/00; C01C3/02; C01C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A PROCESS FOR REMOVING HYDROCYCANIC ACID AND CYANOGEN CHLORIDE FROM AIR TO BE BREATHED AND WHICH CONSISTS IN THE PASSING OF AIR THROUGH AN ACTIVATED CHARCOAL INPREGNATED WITH A WATER SOLUBLE SALT OF THIOCYANIC ACID.
Claim 2
Dependent Claim
35 words
A PROCESS FOR REMOVING HYDROCYCANIC ACID AND CYANOGEN CHLORIDE FROM AIR TO BE BREATHED AND WHICH CONSISTS IN THE PASSING OF AIR THROUGH AN ACTIVATED CHARCOAL INPREGNATED WITH A WATER SOLUBLE SALT OF THIOCYANIC ACID.
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) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |