US2986437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable support apparatus
Assignee: Individual
•
Filing: 1958-04-24
•
Granted: 1961-05-30
•
Expires: 1978-04-24
Abstract
No abstract record available.
Inventors
- 👤 Halford G Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:57
CPC Classifications
A; A47; A47C; A47C16/00; A47C16/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1068593A
Cited
US1369884A
Cited
US1360180A
Cited
US1493036A
Cited
US1662293A
Cited
US2647716A
Cited
US2867401A
Cited
US2871928A
Cited
US2797973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |