Patent US6312272B1 successfully refreshed from Google Patents.
US2068420A
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US
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Casting machine
Assignee: Willard Storage Battery Co
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Filing: 1933-08-05
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Granted: 1937-01-19
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Expires: 1953-08-05
Abstract
No abstract record available.
Inventors
- 👤 Harry B Lockwood
- 👤 Alfred R Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:56
CPC Classifications
B; B22; B22D; B22D25/00; B22D25/02; B22D25/04; Y; Y10; Y10S; Y10S164/00; Y10S164/01; Y10T; Y10T29/00; Y10T29/10
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) | 1940-01-19 | 1940-07-20 | 1941-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-01-19 | 1944-07-20 | 1945-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-01-19 | 1948-07-20 | 1949-01-19 | $7700.00 | Window Closed / Lapsed |