Patent US2878237A successfully refreshed from Google Patents.
US2878237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mercapto dibasic acids as regulators for the polymerization of acrylic acids, amidesand salts
Assignee: Wyeth Holdings LLC
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Filing: 1955-06-15
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Granted: 1959-03-17
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Expires: 1975-06-15
Abstract
No abstract record available.
Inventors
- 👤 Russell William Norman
- 👤 Suen Tzeng Jiueq
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:41
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
THE METHOD OF MAKING WATER-SOLUBLE POLYMERS OF MONOMERIC COMPOUNDS HAVING THE GENERAL FORMULA:
Claim 2
Independent Claim
13 words
THE METHOD OF MAKING WATER-SOLUBLE POLYMERS OF MONOMERIC COMPOUNDS HAVING THE GENERAL 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) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |