US3184440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interpolymer comprising acrylic acid, an acrylic acid ester and a maleic anhydride derivative and a process of preparation
Assignee: WR Grace and Co
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Filing: 1962-07-17
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Granted: 1965-05-18
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Expires: 1982-07-17
Abstract
No abstract record available.
Inventors
- 👤 Rajendra N Chadha
- 👤 Donald E Jefferson
- 👤 Frank X Werber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:18
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F22/00; C08F22/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A COMPOSITION COMPRISING (A) AN ACRYLIC ACID ESTER, (B) FROM ABOUT 1 TO ABOUT 15% BY WEIGHT OF AN ALUMINUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYL ALUMINUM DIHALIDE, ALKYL ALUMINUM SESQUIHALIDE, DIALKYL ALUMINUM HALIDE, DIAKY ALUMINUM HYDRIDE AND TRIALKYL ALUMINUM, AND (C) FROM ABOUT 0.05 TO ABOUT 5% BY WEIGHT OF AN ACRYLIC ACID OF THE FORMULA
Claim 2
Dependent Claim
59 words
A COMPOSITION COMPRISING (A) AN ACRYLIC ACID ESTER, (B) FROM ABOUT 1 TO ABOUT 15% BY WEIGHT OF AN ALUMINUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKYL ALUMINUM DIHALIDE, ALKYL ALUMINUM SESQUIHALIDE, DIALKYL ALUMINUM HALIDE, DIAKY ALUMINUM HYDRIDE AND TRIALKYL ALUMINUM, AND (C) FROM ABOUT 0.05 TO ABOUT 5% BY WEIGHT OF AN ACRYLIC ACID OF THE FORMULA
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) | 1968-05-17 | 1968-11-16 | 1969-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-17 | 1972-11-16 | 1973-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-17 | 1976-11-16 | 1977-05-18 | $7700.00 | Window Closed / Lapsed |