US1769839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaning machine
Assignee: SKAYEF BALL BEARING Co
•
Filing: 1929-06-07
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Granted: 1930-07-01
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Expires: 1949-06-07
Abstract
No abstract record available.
Inventors
- 👤 Jacobson Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:55
CPC Classifications
F; F26; F26B; F26B15/00; F26B15/02; F26B15/04; F26B21/00; F26B21/50; F26B21/55
Claims Analysis
Total Claims: 0
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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) | 1933-06-30 | 1933-12-30 | 1934-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-06-30 | 1937-12-30 | 1938-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-06-30 | 1941-12-30 | 1942-07-01 | $7700.00 | Window Closed / Lapsed |