US2506244A
Expired / Lapsed
US
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Method of producing ceramic bodies having longitudinal passages
Assignee: SPOLEK PRO CHEMICKOU A LUTNI V
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Filing: 1947-07-09
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Granted: 1950-05-02
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Expires: 1967-07-09
Abstract
No abstract record available.
Inventors
- 👤 Stopka Viktor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:05
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/06; C04B38/063; C04B38/0635; C04B38/0645; C04B38/065; B; B28; B28B; B28B7/00; B28B7/34; B28B7/342; C04B33/00; C04B33/02; Y; Y10; Y10S; Y10S264/00; Y10S264/44; Y10S425/00; Y10S425/012
Claims Analysis
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |