US3359249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homo- and copolymerization of vinyl monomers using tautomeric aldehyde derivatives as catalysts
Assignee: Evonik Operations GmbH
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Filing: 1964-11-10
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Granted: 1967-12-19
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Expires: 1984-11-10
Abstract
No abstract record available.
Inventors
- 👤 Hopff Heinrich
- 👤 Kleiner Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:51
CPC Classifications
C; C08; C08F; C08F4/00; C08F16/00; C08F2/00; C08F2/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
IN A PROCESS FOR THE POLYMERIZATION OF AT LEAST ONE VINYL MONOMER HAVING A TERMINAL CH2=C< GROUP, THE STEP OF CARRYING OUT SUCH POLYMERIZATION IN CONTACT WITH A CATALYTICALLY EFFECTIVE AMOUNT OF AT LEAST ONE TAUTOMERIC COMPOUND OF THE FORMULAE:
Claim 2
Dependent Claim
40 words
IN A PROCESS FOR THE POLYMERIZATION OF AT LEAST ONE VINYL MONOMER HAVING A TERMINAL CH2=C< GROUP, THE STEP OF CARRYING OUT SUCH POLYMERIZATION IN CONTACT WITH A CATALYTICALLY EFFECTIVE AMOUNT OF AT LEAST ONE TAUTOMERIC COMPOUND OF THE FORMULAE:
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |