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US2812573A
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Assignee: Individual
•
Filing: 1954-03-15
•
Granted: 1957-11-12
•
Expires: 1974-03-15
Abstract
No abstract record available.
Inventors
- 👤 Earl F May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:59
CPC Classifications
B; B22; B22D; B22D7/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12229; Y10T428/12271; Y10T428/12285; Y10T428/12306
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1738882A
Cited
US745177A
Cited
US1554367A
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US1786571A
Cited
US1973374A
Cited
US2221948A
Cited
US2720967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |