US3255125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double bridged bivalent tetrahedral metal polymers
Assignee: Pennwalt Corp
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Filing: 1963-02-19
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Granted: 1966-06-07
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Expires: 1983-02-19
Abstract
No abstract record available.
Inventors
- 👤 Block Burton Peter
- 👤 Simkin Joseph
- 👤 Edwin S Roth
- 👤 Selwyn H Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:51
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
51 words
A POLYMER HAVING AN INORGANIC BACKBONE COMPRISING A BIVALENT TETRAHEDRAL METAL DOUBLY BRIDGED WITH A CATENATING GROUP WHICH IS THE ANION OF A PHOSPHINIC ACID OF THE STRUCTURE OF R2P(O)OH WHERE R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, ALKOXY AND ARYLOXY CONTAINING FROM 1 TO 12 CARBON ATOMS.
Claim 2
Dependent Claim
51 words
A POLYMER HAVING AN INORGANIC BACKBONE COMPRISING A BIVALENT TETRAHEDRAL METAL DOUBLY BRIDGED WITH A CATENATING GROUP WHICH IS THE ANION OF A PHOSPHINIC ACID OF THE STRUCTURE OF R2P(O)OH WHERE R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, ALKOXY AND ARYLOXY CONTAINING FROM 1 TO 12 CARBON ATOMS.
Claim 3
Dependent Claim
62 words
AN INTERFACIAL POLYMERIZATION PROCESS IN WHICH SOLUTIONS OF A PHOSPHINIC ACID HAVING THE STRUCTURE R2P(O)OH, WHERE R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, ALKOXY AND ARYLOXY CONTAINING FROM 1 TO 12 CARBON ATOMS, AND A BIVALENT TETRAHEDRAL METAL SALT DISSOLVED IN IMMISCIBLE SOLVENTS ARE REACTED UNDER CONDITIONS OF VIGOROUS MIXING WHEREBY A POLYMER HAVING AN INORGANIC BACKBONE IS PRECIPITATED.
Claim 4
Dependent Claim
62 words
AN INTERFACIAL POLYMERIZATION PROCESS IN WHICH SOLUTIONS OF A PHOSPHINIC ACID HAVING THE STRUCTURE R2P(O)OH, WHERE R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, ALKOXY AND ARYLOXY CONTAINING FROM 1 TO 12 CARBON ATOMS, AND A BIVALENT TETRAHEDRAL METAL SALT DISSOLVED IN IMMISCIBLE SOLVENTS ARE REACTED UNDER CONDITIONS OF VIGOROUS MIXING WHEREBY A POLYMER HAVING AN INORGANIC BACKBONE IS PRECIPITATED.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |