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US3403971A
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US
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Ferripolyphosphates
Assignee: Research Corp
•
Filing: 1967-02-20
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Granted: 1968-10-01
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Expires: 1987-02-20
Abstract
No abstract record available.
Inventors
- 👤 James F Hazel
- 👤 Wallace M Mcnabb
- 👤 Mcelroy Mary Kieran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:02
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/38; C01B25/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2414974A
Cited
US3014784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |