Patent US2803519A successfully refreshed from Google Patents.
US2803519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing barium titanate
Assignee: —
•
Filing: —
•
Granted: 1957-08-20
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Expires: 1974-08-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:08
CPC Classifications
C; C30; C30B; C30B9/00; C30B29/00; C30B29/10; C30B29/12; C04; C04B; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3201; C04B2235/3205; C04B2235/3208; C04B2235/3213; C04B2235/3215; C04B2235/44; C04B2235/444; C04B2235/445
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2691738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |