US2034415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door operating apparatus
Assignee: National Pneumatic Co Inc
•
Filing: 1934-04-26
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Granted: 1936-03-17
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Expires: 1954-04-26
Abstract
No abstract record available.
Inventors
- 👤 Edward G Parvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:31
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/605; E05Y; E05Y2900/00; E05Y2900/50; E05Y2900/53; E05Y2900/531
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) | 1939-03-17 | 1939-09-16 | 1940-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-03-17 | 1943-09-16 | 1944-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-03-17 | 1947-09-16 | 1948-03-17 | $7700.00 | Window Closed / Lapsed |