US2869984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of sodium aluminate solution
Assignee: Individual
•
Filing: 1955-06-13
•
Granted: 1959-01-20
•
Expires: 1975-06-13
Abstract
No abstract record available.
Inventors
- 👤 Gerald M Spence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:48
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/04; C01F7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1157436A
Cited
US1591365A
Cited
US1971354A
Cited
US2141132A
Cited
US2421918A
Cited
US2442137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |