US2808383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of water-soluble methylol compounds of copolymers of an nu-vinyl lactam and an acrylic acid amide and product obtained
Assignee: BASF SE
•
Filing: 1955-04-04
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Granted: 1957-10-01
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Expires: 1975-04-04
Abstract
No abstract record available.
Inventors
- 👤 Fikentscher Hans
- 👤 Wilhelm Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:10
CPC Classifications
C; C08; C08F; C08F8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A WATER-SOLUBLE METHYLOL COMPOUND OF A COPOLYMER OF AN N-VINYL LACTAM AND AT LEAST ONE UNSATURATED CARBOXYLIC ACID AMIDE SELECTED FROM THE CLASS CONSISTING OF ACRYLIC ACID AMIDE AND METHACRYLIC ACID AMIDE, SAID COPOLYMER CONTAINING FROM 5 TO 50% BY WEIGHT OF COPOLYMERIZED VINYL LACTAM.
Claim 2
Dependent Claim
45 words
A WATER-SOLUBLE METHYLOL COMPOUND OF A COPOLYMER OF AN N-VINYL LACTAM AND AT LEAST ONE UNSATURATED CARBOXYLIC ACID AMIDE SELECTED FROM THE CLASS CONSISTING OF ACRYLIC ACID AMIDE AND METHACRYLIC ACID AMIDE, SAID COPOLYMER CONTAINING FROM 5 TO 50% BY WEIGHT OF COPOLYMERIZED VINYL LACTAM.
References Cited (Backward Citations)
US2173005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |