Patent US2641590A successfully refreshed from Google Patents.
US2641590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon monoxide copolymers and a catalytic process for their preparation
Assignee: EIDP Inc
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Filing: 1950-08-18
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Granted: 1953-06-09
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Expires: 1970-08-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Ernest L Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:57
CPC Classifications
C; C08; C08G; C08G67/00; C08G67/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS WHICH COMPRISES REACTING CARBON MONOXIDE WITH A MONOOLEFIN AT A TEMPERATURE OF AT LEAST 250* C. UNDER A PRESSURE OF AT LEAST 1000 ATMOSPHERES IN THE PRESENCE OF A CATALY SELECTED FROM THE CLASS CONSISTING OF ELEMENTARY ALKALI METALS, ALKALI METAL HYDRIDES, ALKALI METAL ALKYLS, ALKALI METAL ARYLS, ALKALI METAL ARALKYLS, SODIUMANTHRACENE, LITHIUMANTHRACENE AND SODIUMACRIDINE.
Claim 2
Dependent Claim
57 words
A PROCESS WHICH COMPRISES REACTING CARBON MONOXIDE WITH A MONOOLEFIN AT A TEMPERATURE OF AT LEAST 250* C. UNDER A PRESSURE OF AT LEAST 1000 ATMOSPHERES IN THE PRESENCE OF A CATALY SELECTED FROM THE CLASS CONSISTING OF ELEMENTARY ALKALI METALS, ALKALI METAL HYDRIDES, ALKALI METAL ALKYLS, ALKALI METAL ARYLS, ALKALI METAL ARALKYLS, SODIUMANTHRACENE, LITHIUMANTHRACENE AND SODIUMACRIDINE.
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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |