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US3024160A Expired / Lapsed US ⏱️ 0.0 years remaining

Paper, particularly printing paper, and method of making same

Assignee: Process Methods Corp
•
Filing: 1957-03-29
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Granted: 1962-03-06
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Expires: 1977-03-29
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Abstract

No abstract record available.

Inventors

  • 👤 Kapral Ales Maria

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 19:36
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; D21H19/12

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 194 words
A METHOD OF AMKING PAPER FROM PAPER PULP CONTAINING AT LEAST CELLULOSE, LIGNIN AND WATER AS CINSTITUTENT MATERIALS IN A CONTINUOUS PROCESS WHICH INCLUDES THE STEPS OF FORMING A PAPER WEB AND DRYING SAID WEB, THE STEPS WHICH COMPRISE APPLYING TO THE FRESHLY-FORMED PAPER WEB A FIRST SOLUTION COMPRISING A LONG-CHAIN CARBOXYLIC ACID ALKALI SALT, AND A SECOND SOLUTION COMPRISING A WATER-SLOUBLE SALT OF A METAL HAVING A VALENCY OF AT LEAST TWO AND CAPABLE OF FORMING WITH THE LONG -CHAIN CARBOXYLIC ACID OF SIAD ALKALI SALT A SUBSTANTIALLY WATER-INSOLUBLE SALT, AND A WATER-SOLUBLE RESINOGENOUS AGENT CONSISTING OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF FORMALDEHYDE, UREA, PHENOL AND FURFURAL, SAID SECOND SOLUTION BEING APPLIED TO SAID WEB AFTER SAID FIRST SOL,UTION IN APPLIED THERETO WHILE SAID WEB CONTINUES TO MOVE THROUGH SAID MACHINE AND SAID SOLUTION BEING APPLIED TO THE WEB SURFACE UNDER STEAM PRESSURE IN MICROCOLLOIDAL DISPERSION DURING A PHASE IN THE DRYING STEP IN WHICH THE PAPER WEB CONTAINS FORM 60 TO 20% BY WEIGHT OF WATER AND IS AT A TEMPERATURE BETWEEB ABOUT 80 TO 100* C., SAID AGENT BEING CONTAINED IN AT LEAST ONE OF SAID SOLUTIONS.

References Cited (Backward Citations)

US1551428A Cited
GB390373A Cited
US2036156A Cited
US2037522A Cited
US1986291A Cited
GB448611A Cited
US2309089A Cited
US2338710A Cited
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US2414327A Cited
US2380043A Cited
US2447064A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1965-03-05 1965-09-04 1966-03-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1969-03-05 1969-09-04 1970-03-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1973-03-05 1973-09-04 1974-03-06 $7700.00 Window Closed / Lapsed

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