US903150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for purifying and humidifying air.
Assignee: Warren Webster & Co
•
Filing: 1908-03-14
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Granted: 1908-11-03
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Expires: 1928-03-14
Abstract
No abstract record available.
Inventors
- 👤 William G R Braemer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:38
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26; B01D53/261; Y; Y10; Y10S; Y10S261/00; Y10S261/34
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) | 1911-11-03 | 1912-05-04 | 1912-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-11-03 | 1916-05-04 | 1916-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-11-03 | 1920-05-04 | 1920-11-03 | $7700.00 | Window Closed / Lapsed |