US2801169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sizing paper with the condensation product of a long chain alkylamine withmethylenebisacrylamide
Assignee: Wyeth Holdings LLC
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Filing: 1954-06-10
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Granted: 1957-07-30
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Expires: 1974-06-10
Abstract
No abstract record available.
Inventors
- 👤 Lennart A Lundberg
- 👤 Jr Walter F Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:51
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G12/00; C08G12/46; D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/07; D21H17/20; D21H17/33; D21H17/34; D21H17/37; D21H17/375; D21H17/41; D21H17/44; D21H17/45; D21H17/455; D21H17/46; D21H17/54; D21H17/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR MANUFACTURING, SIZED PAPER WHICH COMPRISED CONTACTING CELLULOSIC FIBERS WITH A DILUTE AQUEOUS DISPERSION OF A SALT OF A CONDENSATION PRODUCT OF ABOUT 1 MOL OF A C16-C22 LONG CHAIN ALKYLAMINE WITH 1 MOL OF METHYLENEBISACRYLAMIDE, THEREBY UNIFORMLY DEPOSING BETWEEN ABOUT 0.1% AND 5% OF SAID PRODUCT ON SAID FIBERS BASED ON THE DRY WEIGHT THEREOF, AND HEATING THE FIBERS AT ABOUT 190*-260* F. FOR ONE-HALF TO TEN MINUTES TO DRY THE SAME AND TO DEVELOP THE SIZING PROPERTIES OF THE CONDENSATION PRODUCT THEREON.
Claim 2
Dependent Claim
86 words
A PROCESS FOR MANUFACTURING, SIZED PAPER WHICH COMPRISED CONTACTING CELLULOSIC FIBERS WITH A DILUTE AQUEOUS DISPERSION OF A SALT OF A CONDENSATION PRODUCT OF ABOUT 1 MOL OF A C16-C22 LONG CHAIN ALKYLAMINE WITH 1 MOL OF METHYLENEBISACRYLAMIDE, THEREBY UNIFORMLY DEPOSING BETWEEN ABOUT 0.1% AND 5% OF SAID PRODUCT ON SAID FIBERS BASED ON THE DRY WEIGHT THEREOF, AND HEATING THE FIBERS AT ABOUT 190*-260* F. FOR ONE-HALF TO TEN MINUTES TO DRY THE SAME AND TO DEVELOP THE SIZING PROPERTIES OF THE CONDENSATION PRODUCT THEREON.
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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |