US2671803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehalogenation of halogeno acetic acids by hydrogenation
Assignee: Knapsack AG
•
Filing: 1952-03-11
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Granted: 1954-03-09
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Expires: 1972-03-11
Abstract
No abstract record available.
Inventors
- 👤 Sennewald Kurt
- 👤 Koln Knapsack Kreis
- 👤 Wolfram Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:15
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/377
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS OF DEHALOGENATING OF A HALOGENO ACETIC ACID WHICH COMPRISES PASSING SAID ACID IN THE FORM OF VAPOR IN THE PRESENCE OF HYDROGEN OVER A CATALYST SELECTED FROM THE GROUP CONSISTING OF THE METALS OF THE PLATINUM GROUP AT TEMPERATURES OF ABOUT 180* C. TO ABOUT 250* C.
Claim 2
Dependent Claim
49 words
A PROCESS OF DEHALOGENATING OF A HALOGENO ACETIC ACID WHICH COMPRISES PASSING SAID ACID IN THE FORM OF VAPOR IN THE PRESENCE OF HYDROGEN OVER A CATALYST SELECTED FROM THE GROUP CONSISTING OF THE METALS OF THE PLATINUM GROUP AT TEMPERATURES OF ABOUT 180* C. TO ABOUT 250* C.
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) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |