US2395920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing porous articles
Assignee: Individual
•
Filing: 1942-04-20
•
Granted: 1946-03-05
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Expires: 1962-04-20
Abstract
No abstract record available.
Inventors
- 👤 Grotenhuis Theodore A Te
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:27
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/58; B29C44/583; B29C35/00; B29C35/02; B29C44/20; B29C44/30; B29K; B29K2021/00; B29K2105/00; B29K2105/0058; B29K2105/0064; B29L; B29L2031/00; B29L2031/751; Y; Y10; Y10S; Y10S264/00; Y10S264/46
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) | 1949-03-04 | 1949-09-03 | 1950-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-03-04 | 1953-09-03 | 1954-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-03-04 | 1957-09-03 | 1958-03-05 | $7700.00 | Window Closed / Lapsed |