Patent US2776955A successfully refreshed from Google Patents.
US2776955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction product of stabilized rosin amine with phosphorus pentoxide
Assignee: Hercules Powder Co
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Filing: 1953-07-09
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Granted: 1957-01-08
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Expires: 1973-07-09
Abstract
No abstract record available.
Inventors
- 👤 Rosher Ronald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:57
CPC Classifications
C; C09; C09F; C09F1/00; C09F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE RESINOUS PRODUCT FORMED BY HEATING A STABILIZED ROSIN AMINE WITH PHOSPHORUS PENTOXIDE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AT A TEMPERATURE BETWEEN ABOUT 80* AND ABOUT 170*C. FOR A LENGTH OF TIME BETWEEN ABOUT ONE HOUR AND ABOUT FIVE HOURS, THE MOLAR RATIO OF SAID AMINE TO THE PHOSPHORUS PENTOXIDE VARYING FROM ABOUT 2:1 TO ABOUT 10:1.
Claim 2
Dependent Claim
56 words
THE RESINOUS PRODUCT FORMED BY HEATING A STABILIZED ROSIN AMINE WITH PHOSPHORUS PENTOXIDE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AT A TEMPERATURE BETWEEN ABOUT 80* AND ABOUT 170*C. FOR A LENGTH OF TIME BETWEEN ABOUT ONE HOUR AND ABOUT FIVE HOURS, THE MOLAR RATIO OF SAID AMINE TO THE PHOSPHORUS PENTOXIDE VARYING FROM ABOUT 2:1 TO ABOUT 10:1.
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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) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |