Patent US3114871A successfully refreshed from Google Patents.
Patent US2842453A successfully refreshed from Google Patents.
US2842453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous manufacture of liquid rosin size
Assignee: Wyeth Holdings LLC
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Filing: 1955-05-06
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Granted: 1958-07-08
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Expires: 1975-05-06
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Anderson
- 👤 Jr Floyd B Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:13
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR THE CONTINUOUS MANUFACTURE OF LIQUID ROSIN SIZE WHICH INCLUDES THE STEPS OF CONTINUOUSLY AND SEPARATELY SUPPLYING UNDER PRESSURE A MOLTEN ROSIN AND A HOT AQUEOUS ALKALI METAL ALKALI SOLUTION IN PROPORTION TO PROVIDE A LIQUID SIZE CONTAINING BETWEEN 50% AND 80% BY WEIGHT OF SOLIDS AND NOT MORE THAN 30% BY WEIGHT OF FREE ROSIN INTO A CLOSED CIRCUIT REACTOR, CONTINUOUSLY DISPERSING SAID ROSIN IN SAID SOLUTION THEREIN CONTAINING AN EFFECTIVE AMOUNT OF AUTOGENEOUSLY AND PREFORMED ALKALI METAL ROSINATE AS DISPERSING AGENT FOR SAID ROSIN, AND CONTINUOUSLY DISCHARGING PRODUCT FROM SAID REACTOR.
Claim 2
Dependent Claim
95 words
A PROCESS FOR THE CONTINUOUS MANUFACTURE OF LIQUID ROSIN SIZE WHICH INCLUDES THE STEPS OF CONTINUOUSLY AND SEPARATELY SUPPLYING UNDER PRESSURE A MOLTEN ROSIN AND A HOT AQUEOUS ALKALI METAL ALKALI SOLUTION IN PROPORTION TO PROVIDE A LIQUID SIZE CONTAINING BETWEEN 50% AND 80% BY WEIGHT OF SOLIDS AND NOT MORE THAN 30% BY WEIGHT OF FREE ROSIN INTO A CLOSED CIRCUIT REACTOR, CONTINUOUSLY DISPERSING SAID ROSIN IN SAID SOLUTION THEREIN CONTAINING AN EFFECTIVE AMOUNT OF AUTOGENEOUSLY AND PREFORMED ALKALI METAL ROSINATE AS DISPERSING AGENT FOR SAID ROSIN, AND CONTINUOUSLY DISCHARGING PRODUCT FROM SAID REACTOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |