US2697085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypeptide-trichloroacetic acid spinning solution
Assignee: Akzo Nobel UK PLC
•
Filing: 1950-05-01
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Granted: 1954-12-14
•
Expires: 1970-05-01
Abstract
No abstract record available.
Inventors
- 👤 Bamford Clement Henry
- 👤 Hanby William Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:02
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; C; C07; C07K; C07K1/00; C07K1/02; D01F6/68; D01F6/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A COMPOSITION OF MATTER COMPRISING A SPINNING SOLUTION OF A POLYPEPTIDE IN A LIQUID CONSISTING OF A MIXTURE OF DICHLOROACETIC ACID AND TRICHLOROACETIC ACID, SAID POLYPEPTIDE BEING THE REACTION PRODUCT OF POLYMERIZING AT LEAST ONE DL ANHYDROCARBOXY ALPHA AMINO ACID IN SOLUTION, IN THE PRESENCE OF AN INITIATOR HAVING AN ACTIVE HYDROGEN ATOM, IN A PROPORTION SUCH THAT THE MOLECULAR RATIO OF INITIATOR TO ANHYDROCARBOXYAMINO ACID IS ONE TO AT LEAST 350.
Claim 2
Dependent Claim
72 words
A COMPOSITION OF MATTER COMPRISING A SPINNING SOLUTION OF A POLYPEPTIDE IN A LIQUID CONSISTING OF A MIXTURE OF DICHLOROACETIC ACID AND TRICHLOROACETIC ACID, SAID POLYPEPTIDE BEING THE REACTION PRODUCT OF POLYMERIZING AT LEAST ONE DL ANHYDROCARBOXY ALPHA AMINO ACID IN SOLUTION, IN THE PRESENCE OF AN INITIATOR HAVING AN ACTIVE HYDROGEN ATOM, IN A PROPORTION SUCH THAT THE MOLECULAR RATIO OF INITIATOR TO ANHYDROCARBOXYAMINO ACID IS ONE TO AT LEAST 350.
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |