Patent US3014880A successfully refreshed from Google Patents.
US3014880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixed crystals and process for their preparation
Assignee: Leuna Werke GmbH
•
Filing: 1958-11-10
•
Granted: 1961-12-26
•
Expires: 1978-11-10
Abstract
No abstract record available.
Inventors
- 👤 Bemmann Rudolf
- 👤 Langenbeck Wolfgang
- 👤 Nehring Dietwart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:21
CPC Classifications
C; C07; C07B; C07B31/00; B; B01; B01J; B01J23/00; B01J23/70; C07C; C07C13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS FOR THE PREPARATION OF MIXED CRYSTALS OF AT LEAST TWO METAL CARBONATES WHICH COMPRISES SUBJECTING IN THE PRESENCE OF WATER TO THE ACTION OF CARBON DIOXIDE AT A TEMPERATURE BETWEEN ABOUT 50* AND 200*C. AND UNDER A PRESSURE BETWEEN ABOUT 10 AND 200 ATOMSPHERAS A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF MECHANICAL MIXTURES AND COPRECIPITATES HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
62 words
A PROCESS FOR THE PREPARATION OF MIXED CRYSTALS OF AT LEAST TWO METAL CARBONATES WHICH COMPRISES SUBJECTING IN THE PRESENCE OF WATER TO THE ACTION OF CARBON DIOXIDE AT A TEMPERATURE BETWEEN ABOUT 50* AND 200*C. AND UNDER A PRESSURE BETWEEN ABOUT 10 AND 200 ATOMSPHERAS A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF MECHANICAL MIXTURES AND COPRECIPITATES HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2587599A
Cited
US2553415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |