US3262905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat stabilization of polyvinyl alcohol with alkali metal phosphates
Assignee: Monsanto Co
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Filing: 1962-02-26
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Granted: 1966-07-26
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Expires: 1982-02-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Martins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:03
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
SOLID POLYVINYL ALCOHOL CONTAINING IN INTIMATE DISPERSON 0.2 TO 1.5% BY WEIGHT OF A STABILIZER CONSISTING OF A FINELY DIVIDED ALKALI METAL PHOSPHATE OF SLIGHTLY ACID TO SLIGHTLY ALKALINE REACTION, SAID POLYVINYL ALCOHOL BEING WATER SOLUBLE AND HAVING FROM 0-45% RESIDUAL ACETATE GROUPS CALCULATED AS POLYVINYL ACETATE AND HAVING A VISCOSITY OF 3-65 CENTIPOISES AS A 4% AQUEOUS SLUTION AT 20*C.
Claim 2
Dependent Claim
61 words
SOLID POLYVINYL ALCOHOL CONTAINING IN INTIMATE DISPERSON 0.2 TO 1.5% BY WEIGHT OF A STABILIZER CONSISTING OF A FINELY DIVIDED ALKALI METAL PHOSPHATE OF SLIGHTLY ACID TO SLIGHTLY ALKALINE REACTION, SAID POLYVINYL ALCOHOL BEING WATER SOLUBLE AND HAVING FROM 0-45% RESIDUAL ACETATE GROUPS CALCULATED AS POLYVINYL ACETATE AND HAVING A VISCOSITY OF 3-65 CENTIPOISES AS A 4% AQUEOUS SLUTION AT 20*C.
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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |