US2612487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solutions of homopolymers of certain optically active alpha-amino acids in polychloro- and polyfluoro-acetic acids
Assignee: EIDP Inc
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Filing: 1950-11-24
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Granted: 1952-09-30
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Expires: 1970-11-24
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Miegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:20
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/095; C08J2377/00; C08J2377/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A SOLUTION, IN DICHLOROACETIC ACID, CONTAINING 0.5 TO 30%, BY WEIGHT OF THE TOTAL COMPOSITION, OF AN OPTICALLY ACTIVE HOMOPOLYAMIDE OF DEGREE OF POLYMERIZATION OF AT LEAST 50, THE UNITS OF SAID POLYMER, CONSISTING ESSENTIALLY OF UNITS OF THE SAME OPTICALLY ACTIVE ANTIPODAL SPECIES OF AN ALPHA-MONOAMINOMONOCARBOXYLIC ACID WHEREIN THE CARBON ALPHA TO THE CARBOXYL GROUP IS BONDED TO A PRIMARY AMINO, -NH2, GROUP, A HYDROGEN ATOM, AND AN ALKYL RADICAL OF ONE TO TWO CARBONS.
Claim 2
Dependent Claim
76 words
A SOLUTION, IN DICHLOROACETIC ACID, CONTAINING 0.5 TO 30%, BY WEIGHT OF THE TOTAL COMPOSITION, OF AN OPTICALLY ACTIVE HOMOPOLYAMIDE OF DEGREE OF POLYMERIZATION OF AT LEAST 50, THE UNITS OF SAID POLYMER, CONSISTING ESSENTIALLY OF UNITS OF THE SAME OPTICALLY ACTIVE ANTIPODAL SPECIES OF AN ALPHA-MONOAMINOMONOCARBOXYLIC ACID WHEREIN THE CARBON ALPHA TO THE CARBOXYL GROUP IS BONDED TO A PRIMARY AMINO, -NH2, GROUP, A HYDROGEN ATOM, AND AN ALKYL RADICAL OF ONE TO TWO CARBONS.
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) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |