Patent US2855391A successfully refreshed from Google Patents.
US2855391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of dry rosin size
Assignee: Wyeth Holdings LLC
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Filing: 1956-10-12
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Granted: 1958-10-07
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Expires: 1976-10-12
Abstract
No abstract record available.
Inventors
- 👤 Sr Charles Robert Rothenanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:08
CPC Classifications
C; C11; C11D; C11D15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN THE MANUFACTURE OF DRY ROSIN SIZE FROM MOLTEN ROSIN AND AN AQUEOUS ALKALI METAL CARBONATE SOLUTION WHEREIN A ROSIN IS SAPONIFIED WITH AN AQUEOUS ALKALI METAL CARBONATE SOLUTION AT A TEMPERATURE BELOW THE BOIL TO FORM LIQUID ROSIN SIZE AND SAID SIZE IS DRIED BY CONTACT WITH A HIT SURFACE, THE IMPROVEMENT WHICH CONSISTS IN REMOVING GAS PREDOMINANTLY CARBON DIOXIDE FROM SAID LIQUID SIZE PRIOR TO CONTACT OF SAID LIQUID SIZE WITH SAID HOT SURFACE.
Claim 2
Dependent Claim
76 words
IN THE MANUFACTURE OF DRY ROSIN SIZE FROM MOLTEN ROSIN AND AN AQUEOUS ALKALI METAL CARBONATE SOLUTION WHEREIN A ROSIN IS SAPONIFIED WITH AN AQUEOUS ALKALI METAL CARBONATE SOLUTION AT A TEMPERATURE BELOW THE BOIL TO FORM LIQUID ROSIN SIZE AND SAID SIZE IS DRIED BY CONTACT WITH A HIT SURFACE, THE IMPROVEMENT WHICH CONSISTS IN REMOVING GAS PREDOMINANTLY CARBON DIOXIDE FROM SAID LIQUID SIZE PRIOR TO CONTACT OF SAID LIQUID SIZE WITH SAID HOT SURFACE.
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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |