US3050437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of sized paper
Assignee: Wyeth Holdings LLC
•
Filing: 1959-06-16
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Granted: 1962-08-21
•
Expires: 1979-06-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Herbert G Arlt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:08
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/07; D21H17/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD OF MANUFACTURING SIZED PAPER WHICH COMPRISES FORMING AN AQUEOUS SUSPENSION OF PAPERMAKING CELLULOSE FIBERS, ADDING THERETO AN EMULSION OF A HYDROPHOBIC ORGANIC ISOCYANATE, DEPOSITING AT LEAST PART OF SAID ISOCYANATE ON SAID FIBERS, SHEETING THE SUSPENSION TO FORM A WATERLAID WEB, AND DRYING SAID WEB AT A TEMPERATURE BETWEEN ABOUT 200*F.-250*F. WHEREBY SAID DEPOSITED ISOCYANATE CHEMICALLY REACTS WITH THE FIBERS.
Claim 2
Independent Claim
62 words
A METHOD OF MANUFACTURING SIZED PAPER WHICH COMPRISES FORMING AN AQUEOUS SUSPENSION OF PAPERMAKING CELLULOSE FIBERS, ADDING THERETO AN EMULSION OF A HYDROPHOBIC ORGANIC ISOCYANATE, DEPOSITING AT LEAST PART OF SAID ISOCYANATE ON SAID FIBERS, SHEETING THE SUSPENSION TO FORM A WATERLAID WEB, AND DRYING SAID WEB AT A TEMPERATURE BETWEEN ABOUT 200*F.-250*F. WHEREBY SAID DEPOSITED ISOCYANATE CHEMICALLY REACTS WITH THE FIBERS.
References Cited (Backward Citations)
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Cited
US2303364A
Cited
FR1013946A
Cited
US2806190A
Cited
US2835652A
Cited
GB804504A
Cited
US2893898A
Cited
US2930106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |