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Patent US2915481A successfully refreshed from Google Patents.
US2915481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic resins modified with alkanolamines
Assignee: Pure Oil Co
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Filing: 1951-12-04
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Granted: 1959-12-01
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Expires: 1971-12-04
Abstract
No abstract record available.
Inventors
- 👤 George W Ayers
- 👤 Marcellus J Geerts
- 👤 William A Krewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:56
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A SURFACE-MODIFIED RESIN HAVING AN EXPOSED OUTER SURFACE OF AMINE RADICALS SELECTED FROM THE GROUP OF PRIMARY AMINO-GROUPS AND SECONDUARY AMINO-GROUPS COMPRISING THE TRANSESTERIFICATION REACTION PRODUCT OF THE SURFACE LAYER MOLECULES IN THE PARTICLES OF AN ACRYLIC RESIN SELECTED FROM THE GROUP CONSISTING OF POLYMETHYL METHACRYLATE AND POLYMETHYL ACRYLATE WITH AN ALKANOLAMINE SELECTED FROM THE GROUP CONSISTING OF MONOALKANOLAMINE AND DIALKNOLAMINE, SAID REACTION BEING CARRIED OUT UNDER TRANSESTERIFICATION CONDITIONS TO CAUSE THE REACTION BEING METHYL ALCOHOL AS A BY-PRODUCT AND SAID REACTION BEING CARRIED OUT AT A TEMPERATURE SUFFICIENT TO CAUSE THE METHYL ALCOHOL BY-PRODUCT TO VAPORIZED FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
101 words
A SURFACE-MODIFIED RESIN HAVING AN EXPOSED OUTER SURFACE OF AMINE RADICALS SELECTED FROM THE GROUP OF PRIMARY AMINO-GROUPS AND SECONDUARY AMINO-GROUPS COMPRISING THE TRANSESTERIFICATION REACTION PRODUCT OF THE SURFACE LAYER MOLECULES IN THE PARTICLES OF AN ACRYLIC RESIN SELECTED FROM THE GROUP CONSISTING OF POLYMETHYL METHACRYLATE AND POLYMETHYL ACRYLATE WITH AN ALKANOLAMINE SELECTED FROM THE GROUP CONSISTING OF MONOALKANOLAMINE AND DIALKNOLAMINE, SAID REACTION BEING CARRIED OUT UNDER TRANSESTERIFICATION CONDITIONS TO CAUSE THE REACTION BEING METHYL ALCOHOL AS A BY-PRODUCT AND SAID REACTION BEING CARRIED OUT AT A TEMPERATURE SUFFICIENT TO CAUSE THE METHYL ALCOHOL BY-PRODUCT TO VAPORIZED FROM THE REACTION MIXTURE.
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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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |