US2068332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means of collecting dust from an air current
Assignee: AMERICAN FLOOR SURFACING MACH
•
Filing: 1936-06-24
•
Granted: 1937-01-19
•
Expires: 1956-06-24
Abstract
No abstract record available.
Inventors
- 👤 Richard F Kneisley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:26
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/20; A47L9/10; A47L9/14; A47L9/1427
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1940-01-19 | 1940-07-20 | 1941-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-01-19 | 1944-07-20 | 1945-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-01-19 | 1948-07-20 | 1949-01-19 | $7700.00 | Window Closed / Lapsed |