USRE27026E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of porous structures
Assignee: —
•
Filing: 1969-03-20
•
Granted: 1971-01-12
•
Expires: 1989-03-20
Abstract
Abstract METHOD OF PREPARING A POROUS POLYMER WHICH COMPRISES POLYMERIZING EITHER AN ALKENYL AROMATIC MONOMER, AN ACRYLATE MONOMER, A VINYL ESTER MONOMER, OR MIXTURES THEREOF AND POLYMERIZABLE CROSS-LINKING AGENT IN A BINARY SOLVENT HAVING A CERTAIN RANGE OF SOLUBILITY PARAMETER.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:23
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/04; C08F2/06; C08J; C08J9/00; C08J9/28; C08J9/286
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |