US3033743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rosin sized paper containing sizing promotor
Assignee: Wyeth Holdings LLC
•
Filing: 1957-07-08
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Granted: 1962-05-08
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Expires: 1977-07-08
Abstract
No abstract record available.
Inventors
- 👤 Sewell T Moore
- 👤 Leo A Landers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:46
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN THE MANUFACTURING OF PAPER WHERIN CELLULOSE PAPERMAKING FIBERS ARE SIZED IN DILUTE AQUEOUS SUSPENSION BY ADDITION OF A ROSIN SIZE AND ALUM, SAID FIBERS ARE SHEETED TO FORM A CELLULOSIC WEB, AND SAID WEB IS DRIED TO FORM PAPER, THE STEP OF ADDING TO SAID SUSPENSION A CUATIONIC "O*C. HYDROPHOBE" THERMOSETTING HYDROPHILIC 2,4-DIAMIONO-S-TRIAZINE-FORMALDEHYDE RESIN IN AQUEOUS ACID SOLUTION FORM IN EFFECTIVE AMOUNT, NOT IN EXCESS OF 50% OF THE WEIGHT OF SAID SIZE, AS AGENT INCREASING THE RESISTANCE IMPARTED TO SAID PAPER BY SAID SIZE TO PENETRATION BY AQUEOUS LIQUIDS.
Claim 2
Dependent Claim
91 words
IN THE MANUFACTURING OF PAPER WHERIN CELLULOSE PAPERMAKING FIBERS ARE SIZED IN DILUTE AQUEOUS SUSPENSION BY ADDITION OF A ROSIN SIZE AND ALUM, SAID FIBERS ARE SHEETED TO FORM A CELLULOSIC WEB, AND SAID WEB IS DRIED TO FORM PAPER, THE STEP OF ADDING TO SAID SUSPENSION A CUATIONIC "O*C. HYDROPHOBE" THERMOSETTING HYDROPHILIC 2,4-DIAMIONO-S-TRIAZINE-FORMALDEHYDE RESIN IN AQUEOUS ACID SOLUTION FORM IN EFFECTIVE AMOUNT, NOT IN EXCESS OF 50% OF THE WEIGHT OF SAID SIZE, AS AGENT INCREASING THE RESISTANCE IMPARTED TO SAID PAPER BY SAID SIZE TO PENETRATION BY AQUEOUS LIQUIDS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |