US2508718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of amphoteric amides of acrylic acid and their polymers
Assignee: GAF Chemicals Corp
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Filing: 1945-10-16
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Granted: 1950-05-23
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Expires: 1965-10-16
Abstract
No abstract record available.
Inventors
- 👤 Giffin D Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:33
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
54 words
AN AMPHOTERIC POLYMERIC ALIPHATIC N-SUBSTITUTED AMIDE OF AN ACID SELECTED FROM THE CLASS CONSISTING OF ACRYLIC ACID, A-HALO-SUBSTITUTED, AND A-ALKYL-, A-CYCLOALIPHATIC-, A-ARYL-, AND A-ARALKYL - HYDROCARBON SUBSTITUTED ACRYLIC ACIDS WHEREIN THE N-SUBSTITUENT IS AN ALIPHATIC RADICAL OF AT LEAST 3 CARBON ATOMS WHICH CONTAINS A FREE PRIMARY AMINO GROUP AND A FREE CARBOXYL GROUP.
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) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |