US816371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-purifier.
Assignee: Firm Of Franz Schorg (inhaber L Schorg & K Lohner)
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Filing: 1905-10-18
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Granted: 1906-03-27
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Expires: 1925-10-18
Abstract
No abstract record available.
Inventors
- 👤 Heinrich Platz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:53
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06; Y; Y10; Y10S; Y10S261/00; Y10S261/03; Y10S261/54
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) | 1909-03-26 | 1909-09-25 | 1910-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-03-26 | 1913-09-25 | 1914-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-03-26 | 1917-09-25 | 1918-03-27 | $7700.00 | Window Closed / Lapsed |