US2715461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air flow elevator
Assignee: Individual
•
Filing: 1953-01-02
•
Granted: 1955-08-16
•
Expires: 1973-01-02
Abstract
No abstract record available.
Inventors
- 👤 Leon K Maulsby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:56
CPC Classifications
B; B07; B07B; B07B7/00; B07B7/01
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US393411A
Cited
US466685A
Cited
US1028022A
Cited
US1695383A
Cited
US1618155A
Cited
US1818367A
Cited
US1850719A
Cited
US2125207A
Cited
US2262879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |