US3592834A
Expired / Lapsed
US
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Organo-silica polymers
Assignee: Buckman Laboratories International Inc
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Filing: 1969-01-27
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Granted: 1971-07-13
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Expires: 1989-01-27
Abstract
Abstract ORGANO-SILICA POLYMERS HAVING THE FORMULA: -(SI(-X)2-O)M-(CH2-CH(-R)-R'')N- WHEREIN M AND N ARE INTEGERS INDEPENDENTLY REPRESENTING THE NUMBER OF UNITS; R REPRESENTS -H, -CN, -CONH2, -CONH3$, -COOH, -COO$, -COOM, COOR"; R'' REPRESENTS -NH-, -NH2$-, -NR"-, -NR"H$-, -NR"2$-, -CH2-CHR-; AND WHENEVER R'' CONTAINS NITROGEN, R" REPRESNETS AN ALKYL OR ARYL RADICAL; M REPRESENTS AN ALKALI METAL; X REPRESENTS AN -OH, -O$, -OM; ARE SUITABLE AS SEQUESTERING, DISPERSING, AND FLOCCULATING AGENTS.
Inventors
- 👤 Stanley J Buckman
- 👤 Rudolf F Land
- 👤 Michael L Mishler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:08
CPC Classifications
C; C08; C08G; C08G83/00; C08G83/001; C08F; C08F2/00; C08F2/44; C08G77/00; C08G77/02
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |