Patent US823488A successfully refreshed from Google Patents.
US823488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-still.
Assignee: Individual
•
Filing: 1905-03-03
•
Granted: 1906-06-12
•
Expires: 1925-03-03
Abstract
No abstract record available.
Inventors
- 👤 Robert P Barnstead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:59
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; Y; Y10; Y10S; Y10S203/00; Y10S203/11; Y10S203/18
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) | 1909-06-11 | 1909-12-11 | 1910-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-06-11 | 1913-12-11 | 1914-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-06-11 | 1917-12-11 | 1918-06-12 | $7700.00 | Window Closed / Lapsed |