Patent US3467162A successfully refreshed from Google Patents.
US3467162A
Expired / Lapsed
US
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Process of making concentrated phosphoric acid of improved clarity characteristics
Assignee: CHARLES W PUTNAM
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Filing: 1966-07-11
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Granted: 1969-09-16
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Expires: 1986-07-11
Abstract
No abstract record available.
Inventors
- 👤 Charles W Putnam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:00
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/234; C01B25/2343; Y; Y10; Y10S; Y10S159/00; Y10S159/19; Y10S159/901
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) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |