US2758008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing pure alkali metal niobate
Assignee: International Business Machines Corp
•
Filing: 1955-03-24
•
Granted: 1956-08-07
•
Expires: 1975-03-24
Abstract
No abstract record available.
Inventors
- 👤 Reisman Arnold
- 👤 Holtzberg Frederic
- 👤 Triebwasser Sol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:31
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/495; C01; C01G; C01G33/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
THE PROCESS OF PREPARING SUBSTANTIALLY PURE ALKALI METAL NIOBATE, SELECTED FROM THE GROUP WHICH CONSISTS OF POTASSIUM NIBATE (KNBO3) AND SODIUM NIOBATE (NANBO3), COMPRISING THE STEPS OF INTRODUCING INTO A CONTAINER OF INERT MATERIAL AS STARTING MATERIALS: NIOBIUM PENTOXIDE (NB2O5) AND ALKALI METAL CARBONATE, SELECTED FROM THE GROUP WHICH CONSISTS OF POTASSIUM AND SODIUM CARBONATES, WITH THE NIOBIUM PENTOXIDE INITIALLY MAKING UP A LOWER LAYER OF THE CHARGE IN THIS CONTAINER AND THE CARBONATE MAKING UP THE UPPER LAYER AND SOLE BALANCE
Claim 2
Dependent Claim
82 words
THE PROCESS OF PREPARING SUBSTANTIALLY PURE ALKALI METAL NIOBATE, SELECTED FROM THE GROUP WHICH CONSISTS OF POTASSIUM NIBATE (KNBO3) AND SODIUM NIOBATE (NANBO3), COMPRISING THE STEPS OF INTRODUCING INTO A CONTAINER OF INERT MATERIAL AS STARTING MATERIALS: NIOBIUM PENTOXIDE (NB2O5) AND ALKALI METAL CARBONATE, SELECTED FROM THE GROUP WHICH CONSISTS OF POTASSIUM AND SODIUM CARBONATES, WITH THE NIOBIUM PENTOXIDE INITIALLY MAKING UP A LOWER LAYER OF THE CHARGE IN THIS CONTAINER AND THE CARBONATE MAKING UP THE UPPER LAYER AND SOLE BALANCE
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |