US2397323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making molding material
Assignee: JULIUS F TREFZ
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Filing: 1943-01-19
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Granted: 1946-03-26
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Expires: 1963-01-19
Abstract
No abstract record available.
Inventors
- 👤 Julius J Trefz
- 👤 Leonard S Shoberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:07
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/06; B; B01; B01F; B01F29/00; B01F29/60; B01F29/64
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) | 1949-03-25 | 1949-09-24 | 1950-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-03-25 | 1953-09-24 | 1954-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-03-25 | 1957-09-24 | 1958-03-26 | $7700.00 | Window Closed / Lapsed |