US2638645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry device
Assignee: American Brake Shoe Co
•
Filing: 1949-11-08
•
Granted: 1953-05-19
•
Expires: 1969-11-08
Abstract
No abstract record available.
Inventors
- 👤 Walter J Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:48
CPC Classifications
B; B22; B22D; B22D33/00; B22D33/02; B22D29/00; B22D29/02; B66; B66C; B66C1/00; B66C1/10; B66C1/22; B66C1/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1734174A
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US1694084A
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US1789860A
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US1810100A
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US1941434A
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US1807124A
Cited
US2050711A
Cited
US2138662A
Cited
US1968135A
Cited
US2159132A
Cited
US2139772A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |