US2917477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous polymerization process using amino acid chelating agent and product
Assignee: Wyeth Holdings LLC
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Filing: 1955-01-21
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Granted: 1959-12-15
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Expires: 1975-01-21
Abstract
No abstract record available.
Inventors
- 👤 Suen Tzeng Jiucq
- 👤 Richard L Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:31
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS FOR THE PREPARATION OF A WATER-SOLUBLE THERMOPLASTIC ADDITION POLYMER WHICH COMPRISES ADDING TO A HOMOGENEOUS AQUEOUS SYSTEM COMPRISING AN AQUEOUS SOLUTION OF A MONOMER SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID. ACRYLAMIDE AND METHACRYLAMIDE, A CHELATING AGENT SELECTED FROM THE GROUP CONSISTING OF THE WATER-SOLUBLE SALTS AND ESTERS OF A SATURATED AMINO CARBOXYLIC ACID HAVING THE FORMULAS:
Claim 2
Dependent Claim
62 words
A PROCESS FOR THE PREPARATION OF A WATER-SOLUBLE THERMOPLASTIC ADDITION POLYMER WHICH COMPRISES ADDING TO A HOMOGENEOUS AQUEOUS SYSTEM COMPRISING AN AQUEOUS SOLUTION OF A MONOMER SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID, METHACRYLIC ACID. ACRYLAMIDE AND METHACRYLAMIDE, A CHELATING AGENT SELECTED FROM THE GROUP CONSISTING OF THE WATER-SOLUBLE SALTS AND ESTERS OF A SATURATED AMINO CARBOXYLIC ACID HAVING THE FORMULAS:
References Cited (Backward Citations)
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Cited
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US2667522A
Cited
US2626944A
Cited
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Cited
US2765284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |