US2844573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic hydrogenation
Assignee: Monsanto Chemicals Ltd
•
Filing: 1955-12-23
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Granted: 1958-07-22
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Expires: 1975-12-23
Abstract
No abstract record available.
Inventors
- 👤 Earl W Gluesenkamp
- 👤 William E Weesner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:19
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
THE METHOD OF CATALYTICALLY HYDROGENATING POLYVINYL CHLORIDE BY REACTING SAID POLYVINYL CHLORIDE WITH HYDROGEN IN THE PRESENCE OF A PALLADIUM CATALYST UNDER SUFFICIENTLY HIGH TEMPERATURE AND PRESSURE AND FOR A SUFFICIENT LENGTH OF TIME TO REPLACE AT LEAST 20% OF THE CHLORINE ATOMS WITH HYDROGEN ATOMS.
Claim 2
Independent Claim
46 words
THE METHOD OF CATALYTICALLY HYDROGENATING POLYVINYL CHLORIDE BY REACTING SAID POLYVINYL CHLORIDE WITH HYDROGEN IN THE PRESENCE OF A PALLADIUM CATALYST UNDER SUFFICIENTLY HIGH TEMPERATURE AND PRESSURE AND FOR A SUFFICIENT LENGTH OF TIME TO REPLACE AT LEAST 20% OF THE CHLORINE ATOMS WITH HYDROGEN ATOMS.
References Cited (Backward Citations)
US2199992A
Cited
US2716642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |