Patent US2554810A successfully refreshed from Google Patents.
US2554810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of dehydrogenated rosin acids and derivatives
Assignee: Hercules Powder Co
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Filing: 1947-12-31
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Granted: 1951-05-29
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Expires: 1967-12-31
Abstract
No abstract record available.
Inventors
- 👤 David S Breslow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:29
CPC Classifications
C; C09; C09F; C09F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE METHOD OF POLYMERIZING A DEHYDROGENATED ROSINYL MATERIAL SELECTED FROM THE GROUP CONSISTING OF DEHYDROGENATED ROSIN ACIDS, SALTS OF DEHYDROGENATED ROSIN ACIDS, ESTERS OF DEHYDROGENATED ROSIN ACIDS, DEHYDROGENATED ROSIN ALCOHOLS, ESTERS OF DEHYDROGENATED ROSIN ALCOHOLS, DEHYDROGENATED ROSIN NITRILES, AND DEHYDROGENATED ROSIN OIL WHICH COMPRISES HEATING SAID MATERIAL WITH A SUBSTANCE WHICH DECOMPOSES INTO HYDROCARBON FREE RADICALS WHEN HEATED AT A TEMPERATURE ABOVE ABOUT 50* C. AND BELOW THAT AT WHICH SAID MATERIAL TENDS TO DECOMPOSE, SAID FREE-RADICAL FORMER BEING SELECTED FROM THE GROUP CONSISTING OF ORGANIC PEROXIDES, ORGANIC HYDROPEROXIDES, AND ORGANOMETALLIC COMPOUNDS.
Claim 2
Independent Claim
92 words
THE METHOD OF POLYMERIZING A DEHYDROGENATED ROSINYL MATERIAL SELECTED FROM THE GROUP CONSISTING OF DEHYDROGENATED ROSIN ACIDS, SALTS OF DEHYDROGENATED ROSIN ACIDS, ESTERS OF DEHYDROGENATED ROSIN ACIDS, DEHYDROGENATED ROSIN ALCOHOLS, ESTERS OF DEHYDROGENATED ROSIN ALCOHOLS, DEHYDROGENATED ROSIN NITRILES, AND DEHYDROGENATED ROSIN OIL WHICH COMPRISES HEATING SAID MATERIAL WITH A SUBSTANCE WHICH DECOMPOSES INTO HYDROCARBON FREE RADICALS WHEN HEATED AT A TEMPERATURE ABOVE ABOUT 50* C. AND BELOW THAT AT WHICH SAID MATERIAL TENDS TO DECOMPOSE, SAID FREE-RADICAL FORMER BEING SELECTED FROM THE GROUP CONSISTING OF ORGANIC PEROXIDES, ORGANIC HYDROPEROXIDES, AND ORGANOMETALLIC COMPOUNDS.
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) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |