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US2568684A
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Vestibule diaphragm
Assignee: Individual
•
Filing: 1947-10-24
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Granted: 1951-09-18
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Expires: 1967-10-24
Abstract
No abstract record available.
Inventors
- 👤 Richard F Mihalyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:05
CPC Classifications
A; A63; A63H; A63H19/00; A63H19/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US49227A
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US184461A
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US455427A
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US1019777A
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US2131493A
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US2373680A
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US2324173A
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US2354045A
Cited
US2415385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |