US3681265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of inorganic polymers
Assignee: Air Products and Chemicals Inc
•
Filing: 1970-08-03
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Granted: 1972-08-01
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Expires: 1990-08-03
Abstract
Abstract POLYMERS HAVING AN INORGANIC BACKBONE ARE PREPARED BY REACTING TRIVALENT COBALT SALTS OR TRIVALENT MANGANESE SALTS WITH A PHOSPHINIC ACID IN THE PRESENCE OF AN ORGANIC SOLVENT AT TEMPERATURES OF 75 TO 150*C.
Inventors
- 👤 Paul C Krueger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:37
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/14; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L85/00; C08L85/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |