US508246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for preventing the backflow of water from condensers
Assignee: —
•
Filing: —
•
Granted: 1893-11-07
•
Expires: 1910-11-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:48
CPC Classifications
B; B67; B67D; B67D1/00; B67D1/04; F; F04; F04D; F04D13/00; F04D13/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3127; Y10T137/3149
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) | 1896-11-06 | 1897-05-08 | 1897-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1900-11-07 | 1901-05-09 | 1901-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1904-11-07 | 1905-05-09 | 1905-11-08 | $7700.00 | Window Closed / Lapsed |