US1019548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction device for dust-laden air.
Assignee: Individual
•
Filing: 1911-11-14
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Granted: 1912-03-05
•
Expires: 1931-11-14
Abstract
No abstract record available.
Inventors
- 👤 Karl Spitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:33
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/46
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) | 1915-03-05 | 1915-09-04 | 1916-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1919-03-05 | 1919-09-04 | 1920-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1923-03-05 | 1923-09-04 | 1924-03-05 | $7700.00 | Window Closed / Lapsed |