US1729361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for preparing molder's sand
Assignee: Royer Foundry and Machine Co
•
Filing: 1928-05-12
•
Granted: 1929-09-24
•
Expires: 1948-05-12
Abstract
No abstract record available.
Inventors
- 👤 George F Royer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:17
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/04; B22C5/0409; B22C5/0459; B01; B01F; B01F29/00; B01F29/25; B01F29/60; B01F29/64; B01F29/40; B01F29/403; B01F29/4033; Y; Y10; Y10S; Y10S241/00; Y10S241/10
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) | 1932-09-23 | 1933-03-25 | 1933-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-09-23 | 1937-03-25 | 1937-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-09-23 | 1941-03-25 | 1941-09-24 | $7700.00 | Window Closed / Lapsed |