US2934468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fortified rosin size and paper sized therewith
Assignee: Wyeth Holdings LLC
•
Filing: 1956-07-30
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Granted: 1960-04-26
•
Expires: 1976-07-30
Abstract
No abstract record available.
Inventors
- 👤 Strazdins Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:07
CPC Classifications
C; C11; C11D; C11D15/00; D; D21; D21H; D21H17/00; D21H17/62
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
62 words
A LIQUID ROSIN SIZE CONTAINING AT LEAST 60% OF SIZE SOLIDS BY WEIGHT AND UP TO 30% OF FREE ROSIN ACIDS BASED ON THE WEIGHT OF ROSIN ACIDS ORIGINALLY PRESENT IN THE ROSIN, AND BEING THE ALKALI METAL ALKALI-SAPONIFICATION PRODUCT OF THE MATERIAL RESULTING FROM THE IRREVERSIBLE REACTION OF A ROSIN WITH A SMALL BUT EFFECTIVE AMOUNT OF FORMALDEHYDE AS FORTIFYING AGENT.
Claim 2
Dependent Claim
62 words
A LIQUID ROSIN SIZE CONTAINING AT LEAST 60% OF SIZE SOLIDS BY WEIGHT AND UP TO 30% OF FREE ROSIN ACIDS BASED ON THE WEIGHT OF ROSIN ACIDS ORIGINALLY PRESENT IN THE ROSIN, AND BEING THE ALKALI METAL ALKALI-SAPONIFICATION PRODUCT OF THE MATERIAL RESULTING FROM THE IRREVERSIBLE REACTION OF A ROSIN WITH A SMALL BUT EFFECTIVE AMOUNT OF FORMALDEHYDE AS FORTIFYING AGENT.
Claim 3
Dependent Claim
46 words
A DRY ROSIN SIZE OF INCREASED SIZING EFFICIENCY CONSISTING ESSENTIALLY OF THE MATERIAL PRODUCED BY IRREVERSIBLY REACTING A ROSIN WITH A SMALL BUT EFFECTIVE AMOUNT OF FORMALDEHYDE AS FORTIFYING AGENT, SUBSTANTIALLY COMPLETELY SAPONIFYING IT WITH AN AQUEOUS ALKALI METAL ALKALI, AND DRYING THE RESULTING LIQUID SIZE.
Claim 4
Dependent Claim
46 words
A DRY ROSIN SIZE OF INCREASED SIZING EFFICIENCY CONSISTING ESSENTIALLY OF THE MATERIAL PRODUCED BY IRREVERSIBLY REACTING A ROSIN WITH A SMALL BUT EFFECTIVE AMOUNT OF FORMALDEHYDE AS FORTIFYING AGENT, SUBSTANTIALLY COMPLETELY SAPONIFYING IT WITH AN AQUEOUS ALKALI METAL ALKALI, AND DRYING THE RESULTING LIQUID SIZE.
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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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |