Patent US4610692A successfully refreshed from Google Patents.
US1929538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry equipment
Assignee: Osborn Manufacturing Corp
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Filing: 1929-10-14
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Granted: 1933-10-10
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Expires: 1949-10-14
Abstract
No abstract record available.
Inventors
- 👤 Frank T Spikerman
- 👤 Earl F Oyster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:24
CPC Classifications
B; B22; B22D; B22D33/00
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) | 1936-10-09 | 1937-04-10 | 1937-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-10-09 | 1941-04-10 | 1941-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-10-09 | 1945-04-10 | 1945-10-10 | $7700.00 | Window Closed / Lapsed |