Patent US3416883A successfully refreshed from Google Patents.
US3416883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing chemically pure ferrous carbonate
Assignee: Laboratory For Electronics Inc
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Filing: 1966-09-26
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Granted: 1968-12-17
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Expires: 1986-09-26
Abstract
No abstract record available.
Inventors
- 👤 Floyd T Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:46
CPC Classifications
C; C01; C01G; C01G49/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR PREPARING CHEMICALLY PURE FERROUS CARBONATE COMPRISING THE STEPS OF EXPOSING A CONTAINER OF WATER TO A FLOW OF CARBON DIOXIDE, PLACING METALLIC IRON INTO SAID WATER, SAID CARBON DIOXIDE REACTING WITH SAID WATER AND METALLIC IRON TO FORM CHEMICALY PURE FERROUS CARBONATE IN SOLUTION, AND REMOVING THE CHEMICALLY PURE FERROUS CARBONATE FROM THE SOLUTION.
Claim 2
Dependent Claim
57 words
A PROCESS FOR PREPARING CHEMICALLY PURE FERROUS CARBONATE COMPRISING THE STEPS OF EXPOSING A CONTAINER OF WATER TO A FLOW OF CARBON DIOXIDE, PLACING METALLIC IRON INTO SAID WATER, SAID CARBON DIOXIDE REACTING WITH SAID WATER AND METALLIC IRON TO FORM CHEMICALY PURE FERROUS CARBONATE IN SOLUTION, AND REMOVING THE CHEMICALLY PURE FERROUS CARBONATE FROM THE SOLUTION.
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) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |