US2439334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface cleaning machine
Assignee: Industrial Patents Corp
•
Filing: 1942-09-23
•
Granted: 1948-04-06
•
Expires: 1962-09-23
Abstract
No abstract record available.
Inventors
- 👤 Oscar T Bloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:58
CPC Classifications
A; A22; A22C; A22C21/00; A22C21/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1372393A
Cited
US1502535A
Cited
US1706577A
Cited
US1875980A
Cited
US2235619A
Cited
US2350656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |