Patent US2832703A successfully refreshed from Google Patents.
US2832703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1955-05-13
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Granted: 1958-04-29
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Expires: 1975-05-13
Abstract
No abstract record available.
Inventors
- 👤 Bell Norman
- 👤 Jr Paul P Bellan
- 👤 Donald J Donaldson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:38
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/04; C01F7/14; C01F7/144; C01F7/147
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
THE METHOD OF DISSOLVING ALUMINA HYDRATE SCALE DEPOSITS FROM PRECIPITATION APPARATUS EMPLOYED IN ALKALINE ALUMINA REFINING OPERATIONS COMPRISING CONTACTING SAID SCALE WITH A CAUSTIC SODA SOLUTION HAVING A POTENTIAL SOLVENT CAPCAITY FOR ALUMINA HYDRATE, EXPRESSED AS AN ALUMI-
Claim 2
Independent Claim
38 words
THE METHOD OF DISSOLVING ALUMINA HYDRATE SCALE DEPOSITS FROM PRECIPITATION APPARATUS EMPLOYED IN ALKALINE ALUMINA REFINING OPERATIONS COMPRISING CONTACTING SAID SCALE WITH A CAUSTIC SODA SOLUTION HAVING A POTENTIAL SOLVENT CAPCAITY FOR ALUMINA HYDRATE, EXPRESSED AS AN ALUMI-
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) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |