US3432428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphosphate glasses and water treatment uses thereof
Assignee: ChampionX LLC
•
Filing: 1965-06-24
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Granted: 1969-03-11
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Expires: 1985-06-24
Abstract
No abstract record available.
Inventors
- 👤 Louis F Wirth Jr
- 👤 Reed S Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:36
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/184
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |