US2622960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glyoxal treatment of absorbent paper to improve wet strength
Assignee: A P W Products Co Inc
•
Filing: 1948-03-16
•
Granted: 1952-12-23
•
Expires: 1968-03-16
Abstract
No abstract record available.
Inventors
- 👤 Walter E Woods
- 👤 Schenck Willard Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:28
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/06; Y; Y10; Y10S; Y10S8/00; Y10S8/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE PROCESS OF PRODUCING AN ABSORBENT PAPER HAVING IMPROVED WET STRENGTH, COMPRISING THE STEPS; APPLYING TO A PREFORMED SHEET OF ABSORBENT PAPER AN AQUEOUS SOLUTION CONTAINING GLYOXAL AS ITS SOLE ESSENTIAL ACTIVE INGREDIENT TO DEPOSIT ON SAID SHEET A QUANTITY OF GLYOXAL EQUAL TO BETWEEN 0.3% AND 3% BY WEIGHT OF SAID SHEET, AND HEATING SAID SHEET TO CAUSE SAID GLYOXAL TO REACT WITH THE CELLULOSE OF SAID PAPER TO IMPROVE THE WET STRENGTH OF SAID SHEET.
Claim 2
Dependent Claim
77 words
THE PROCESS OF PRODUCING AN ABSORBENT PAPER HAVING IMPROVED WET STRENGTH, COMPRISING THE STEPS; APPLYING TO A PREFORMED SHEET OF ABSORBENT PAPER AN AQUEOUS SOLUTION CONTAINING GLYOXAL AS ITS SOLE ESSENTIAL ACTIVE INGREDIENT TO DEPOSIT ON SAID SHEET A QUANTITY OF GLYOXAL EQUAL TO BETWEEN 0.3% AND 3% BY WEIGHT OF SAID SHEET, AND HEATING SAID SHEET TO CAUSE SAID GLYOXAL TO REACT WITH THE CELLULOSE OF SAID PAPER TO IMPROVE THE WET STRENGTH OF SAID SHEET.
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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) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |