US1941804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous ceramic product and the manufacture thereof
Assignee: Individual
•
Filing: 1930-06-18
•
Granted: 1934-01-02
•
Expires: 1950-06-18
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:38
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/06; C04B38/063; C04B38/0635; C04B38/0645; C04B38/068; Y; Y10; Y10S; Y10S264/00; Y10S264/63
Claims Analysis
Total Claims: 0
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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) | 1937-01-01 | 1937-07-03 | 1938-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-01-01 | 1941-07-03 | 1942-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-01-01 | 1945-07-03 | 1946-01-02 | $7700.00 | Window Closed / Lapsed |