US2997445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid-gas absorbent
Assignee: McGraw Edison Co
•
Filing: 1958-04-18
•
Granted: 1961-08-22
•
Expires: 1978-04-18
Abstract
No abstract record available.
Inventors
- 👤 Lewis J Nuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:22
CPC Classifications
A; A62; A62B; A62B19/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A SUBSTANTIALLY DRY SOLID PRODUCT FOR ABSORBING ACIDIC GASES, CONSISTING ESSENTIALLY OF 10% TO 25% BARIUM HYDROXIDE CONTAINING WATER OF CRYSTALLIZATION, 1% TO 10% POTASSIUM HYDROXIDE, ABOUT 10% FREE WATER AND THE BALANCE SLAKED LIME.
Claim 2
Dependent Claim
35 words
A SUBSTANTIALLY DRY SOLID PRODUCT FOR ABSORBING ACIDIC GASES, CONSISTING ESSENTIALLY OF 10% TO 25% BARIUM HYDROXIDE CONTAINING WATER OF CRYSTALLIZATION, 1% TO 10% POTASSIUM HYDROXIDE, ABOUT 10% FREE WATER AND THE BALANCE SLAKED LIME.
References Cited (Backward Citations)
DE198519C
Cited
US1207273A
Cited
US1441696A
Cited
GB277540A
Cited
US2395842A
Cited
DE732771C
Cited
US2322206A
Cited
US2470214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |