US2541733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkali metal carbonate perhydrates
Assignee: EIDP Inc
•
Filing: 1947-05-22
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Granted: 1951-02-13
•
Expires: 1967-05-22
Abstract
No abstract record available.
Inventors
- 👤 James H Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:55
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/055; C01B15/10; C01B15/103
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
53 words
IN A PROCESS FOR PRODUCING AN ALKALI METAL CARBONATE PERHYDRATE BY THE REACTION OF AN ALKALI METAL CARBONATE WITH HYDROGEN PEROXIDE IN AN AQUEOUS REACTION MEDIUM FROM WHICH THE PERHYDRATE PRODUCT IS PRECIPITATED, THE IMPROVEMENT COMPRISING EFFECTING SAID REACTION IN A MEDIUM WHICH INITIALLY CONTAINS PREFORMED CRYSTALS OF SAID ALKALI METAL CARBONATE PERHYDRATE.
References Cited (Backward Citations)
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US1669997A
Cited
US1950320A
Cited
US1997691A
Cited
US2012854A
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |