Patent US2990602A successfully refreshed from Google Patents.
US2990602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of hot-pressing ceramic ferroelectric materials
Assignee: Individual
•
Filing: 1959-01-05
•
Granted: 1961-07-04
•
Expires: 1979-01-05
Abstract
No abstract record available.
Inventors
- 👤 Ronald J Brandmayr
- 👤 Arthur E Brown
- 👤 Vita Sam Di
- 👤 Robert J Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:53
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/02; B30B15/022; B30B11/00; B30B11/02; B30B15/34; C; C04; C04B; C04B33/00; C04B33/32; C04B33/326; C04B35/00; C04B35/622; C04B35/64; C04B35/645; Y; Y10; Y10S; Y10S425/00; Y10S425/026
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2741561A
Cited
US2091569A
Cited
US2335325A
Cited
US2563307A
Cited
FR1120211A
Cited
US2956327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |