US2974993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Object engaging device
Assignee: Individual
•
Filing: 1957-09-27
•
Granted: 1961-03-14
•
Expires: 1977-09-27
Abstract
No abstract record available.
Inventors
- 👤 Henry G Duniven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:55
CPC Classifications
A; A47; A47G; A47G21/00; A47G21/02; A47G21/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US99971A
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US187363A
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US643954A
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US758811A
Cited
US824642A
Cited
US1692077A
Cited
US2127947A
Cited
US2315143A
Cited
US2663543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |