US2652380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soluble calcium salt of a copolymer of vinyl acetate and a mono-ester of maleic acid
Assignee: Monsanto Chemicals Ltd
•
Filing: 1952-01-02
•
Granted: 1953-09-15
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Expires: 1972-01-02
Abstract
No abstract record available.
Inventors
- 👤 Ross M Hedrick
- 👤 David T Mowry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:25
CPC Classifications
C; C08; C08F; C08F8/00; C08F2800/00; C08F2800/10; C08F2810/00; C08F2810/50; Y; Y10; Y10S; Y10S260/00; Y10S260/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A COMPOSITION OF MATTER WHICH COMPRISES A CALCIUM SALT OF A COPOLYMER OF ONE TO TWO MOLES OF VINYL ACETATE AND ONE MOLE OF A MALEIC ANHYDRIDE WHICH HAS BEEN ESTERIFIED WITH 0.2 TO 0.6 MOLES OF AN ALCOHOL OF THE GROUP CONSISTING OF ETHANOL, METHANOL N-PROPANOL AND ISOPROPANOL.
Claim 2
Dependent Claim
49 words
A COMPOSITION OF MATTER WHICH COMPRISES A CALCIUM SALT OF A COPOLYMER OF ONE TO TWO MOLES OF VINYL ACETATE AND ONE MOLE OF A MALEIC ANHYDRIDE WHICH HAS BEEN ESTERIFIED WITH 0.2 TO 0.6 MOLES OF AN ALCOHOL OF THE GROUP CONSISTING OF ETHANOL, METHANOL N-PROPANOL AND ISOPROPANOL.
References Cited (Backward Citations)
US2324739A
Cited
US2483960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |