US2976246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
composition
Assignee: —
•
Filing: —
•
Granted: 1961-03-21
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Expires: 1978-03-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:21
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/495; C01; C01G; C01G33/00; C01G33/006; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3201; C04B2235/3203; C04B2235/3205; C04B2235/3208; C04B2235/3212; C04B2235/3231; C04B2235/3251; C04B2235/3255; C04B2235/65; C04B2235/656; C04B2235/70; C04B2235/74; C04B2235/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
THE METHOD OF PRODUCING A CERAMIC IN THE POTASSIUM-SODIUM-NIOBATE SYSTEM IN THE RANGE OF FROM K9NA1(NBO3) TO K1KA9(NBO3) COMPRISING THE STEPS OF COMBINING SODIUM CARBONATE (NA2CO3), POTASSIUM CARBONATE (K2CO3) AND NIOBIUM PENTOXIDE (NB2O5) IN PROPORTIONS SUCH THAT THE RATIO OF THE MOLES OF NIOBIUM PENTOXIDE TO THE SUM OF THE MOLES OF POTASSIUM CARBONATE AND SODIUM CARBONATE IS APPROXIMATELY UNITY AND THE RATIO OF THE MOLES OF SODIUM CARBONATE TO THE MOLES OF POTASSIUM CARBONATE IS IN THE RANGE OF FROM APPROXIMATELY 1:9 TO 9:1 AND CORRESPONDS TO THE RATIO OF THE MOLES OF SODIUM TO THE MOLES OF POTASSIUM IN THE CERAMIC BEING PRODUCED, CALCINING THE MIXTURE AT A TEMPERATURE IN THE RANGE OF 750*C. TO 1050*C. MOLDING THE CALCINED MATERIAL INTO A DESIRED SHAPE, AND FIRING THE SHAPE IN ACCORDANCE WITH THE FOLLOWING SCHEDULE:
Claim 2
Independent Claim
136 words
THE METHOD OF PRODUCING A CERAMIC IN THE POTASSIUM-SODIUM-NIOBATE SYSTEM IN THE RANGE OF FROM K9NA1(NBO3) TO K1KA9(NBO3) COMPRISING THE STEPS OF COMBINING SODIUM CARBONATE (NA2CO3), POTASSIUM CARBONATE (K2CO3) AND NIOBIUM PENTOXIDE (NB2O5) IN PROPORTIONS SUCH THAT THE RATIO OF THE MOLES OF NIOBIUM PENTOXIDE TO THE SUM OF THE MOLES OF POTASSIUM CARBONATE AND SODIUM CARBONATE IS APPROXIMATELY UNITY AND THE RATIO OF THE MOLES OF SODIUM CARBONATE TO THE MOLES OF POTASSIUM CARBONATE IS IN THE RANGE OF FROM APPROXIMATELY 1:9 TO 9:1 AND CORRESPONDS TO THE RATIO OF THE MOLES OF SODIUM TO THE MOLES OF POTASSIUM IN THE CERAMIC BEING PRODUCED, CALCINING THE MIXTURE AT A TEMPERATURE IN THE RANGE OF 750*C. TO 1050*C. MOLDING THE CALCINED MATERIAL INTO A DESIRED SHAPE, AND FIRING THE SHAPE IN ACCORDANCE WITH THE FOLLOWING SCHEDULE:
References Cited (Backward Citations)
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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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |