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US2536140A
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Assignee: Individual
•
Filing: 1944-04-06
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Granted: 1951-01-02
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Expires: 1964-04-06
Abstract
No abstract record available.
Inventors
- 👤 Edward A Rockwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:42
CPC Classifications
F; F15; F15B; F15B21/00; B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/14; B60T13/141; B60T13/142; B60T13/147; B60T13/148; B60T13/16; B60T13/58; F15B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1550089A
Cited
US1885235A
Cited
US1938979A
Cited
US1887880A
Cited
US1847604A
Cited
FR769257A
Cited
US2308712A
Cited
US2162797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |