US3764356A
Expired / Lapsed
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Hydrated alkali metal silicate glass particles with sequestering agents
Assignee: PQ Corp
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Filing: 1971-01-25
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Granted: 1973-10-09
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Expires: 1991-01-25
Abstract
Abstract ALALKI METAL SILICATE GLASS PARTICLES ARE HYDRATED WITH SOLUTIONS OF ORGANIC SEQUESTERING AGENTS TO PRODUCE A HYDRATED, READILY SOLUBLE COMPOSITE.
Inventors
- 👤 R Sams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:13
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C01; C01B; C01B33/00; C01B33/20; C01B33/32; C01B33/325; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/105; C02F5/12; C02F5/125; C11; C11D; C11D3/00; C11D3/02; C11D3/04; C11D3/08; C11D3/16; C11D3/20; C11D3/2075; C11D3/2086; C11D3/26; C11D3/33
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |