US2524045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multichain polyamide resins
Assignee: Wingfoot Corp
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Filing: 1946-06-05
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Granted: 1950-10-03
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Expires: 1966-06-05
Abstract
No abstract record available.
Inventors
- 👤 Paul J Flory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:15
CPC Classifications
C; C08; C08G; C08G69/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE METHOD OF PREPARING AN AMIDE CONDENSATION POLYMER WHICH COMPORISES CONDENSING A COMPOUND OF THE GROUP CONSISTING OF AMINO ACIDS HAVING A SINGLE PRIMARY AMINO GROUP AND A SINGLE CARBOXYLIC ACID GROUP SEPARATED BY MORE THAN FOUR ATOMS, SAID AMINO ACIDS BEING FREE FROM OTHER REACTIVE SUBSTITUENTS AND THE CORRESPONDING ESTERS, AMIDES, AND LACTAMS OF SAID AMINO ACIDS, WITH A COMPOUND OF THE GROUP CONSISTING OF POLYMERIC CARBOXYLIC ACIDS CONTAINING AN AVERAGE OF 10 TO 500 CARBOXYL RADICALS PER MOLECULE AND BEING FREE FROM OTHER REACTIVE SUBSTITUENTS AND THE CORRESPONDING ESTERS, AMIDES, AND ACID CHLORIDES OF SAID CARBOXYLIC ACIDS, SAID AMINO ACIDS BEING PRESENT IN THE PROPORTION OF FROM 500 TO 20,000 MOLECULES FOR EACH MOLECULE OF THE POLYCARBOXYLIC ACID.
Claim 2
Independent Claim
120 words
THE METHOD OF PREPARING AN AMIDE CONDENSATION POLYMER WHICH COMPORISES CONDENSING A COMPOUND OF THE GROUP CONSISTING OF AMINO ACIDS HAVING A SINGLE PRIMARY AMINO GROUP AND A SINGLE CARBOXYLIC ACID GROUP SEPARATED BY MORE THAN FOUR ATOMS, SAID AMINO ACIDS BEING FREE FROM OTHER REACTIVE SUBSTITUENTS AND THE CORRESPONDING ESTERS, AMIDES, AND LACTAMS OF SAID AMINO ACIDS, WITH A COMPOUND OF THE GROUP CONSISTING OF POLYMERIC CARBOXYLIC ACIDS CONTAINING AN AVERAGE OF 10 TO 500 CARBOXYL RADICALS PER MOLECULE AND BEING FREE FROM OTHER REACTIVE SUBSTITUENTS AND THE CORRESPONDING ESTERS, AMIDES, AND ACID CHLORIDES OF SAID CARBOXYLIC ACIDS, SAID AMINO ACIDS BEING PRESENT IN THE PROPORTION OF FROM 500 TO 20,000 MOLECULES FOR EACH MOLECULE OF THE POLYCARBOXYLIC ACID.
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) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |