Patent US2579061A successfully refreshed from Google Patents.
US2579061A
Expired / Lapsed
US
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Copolymers of hydrogen cyanide and their preparation
Assignee: EIDP Inc
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Filing: 1950-07-10
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Granted: 1951-12-18
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Expires: 1970-07-10
Abstract
No abstract record available.
Inventors
- 👤 David W Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:22
CPC Classifications
C; C08; C08G; C08G73/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A COPOLYMER OF FROM 0.5 TO 50.0 MOLE PERCENT OF HYDROGEN CYANIDE WITH FROM 99.5 TO 50.0 MOLE PERCENT OF AN ETHYLENICALLY UNSATURATED MONOMER WHICH UNDERGOES ADDITION POLYMERIZATION, SAID COPOLYMER CONTAINING RECURRING IMINO GROUPS DIRECTLY ATTACHED THROUGH NITROGEN THEREOF BY A DOUBLE BOND TO A CARBON ATOM OF THE MAIN POLYMER CHAIN.
Claim 2
Dependent Claim
52 words
A COPOLYMER OF FROM 0.5 TO 50.0 MOLE PERCENT OF HYDROGEN CYANIDE WITH FROM 99.5 TO 50.0 MOLE PERCENT OF AN ETHYLENICALLY UNSATURATED MONOMER WHICH UNDERGOES ADDITION POLYMERIZATION, SAID COPOLYMER CONTAINING RECURRING IMINO GROUPS DIRECTLY ATTACHED THROUGH NITROGEN THEREOF BY A DOUBLE BOND TO A CARBON ATOM OF THE MAIN POLYMER CHAIN.
References Cited (Backward Citations)
US2478066A
Cited
US2456428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |