Patent US497116A successfully refreshed from Google Patents.
Patent US1226796A successfully refreshed from Google Patents.
US1226796A
Expired / Lapsed
US
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Automatic drain-valve.
Assignee: Individual
•
Filing: 1916-07-10
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Granted: 1917-05-22
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Expires: 1936-07-10
Abstract
No abstract record available.
Inventors
- 👤 Charles W Newcombe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:26
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; F; F16; F16K; F16K11/00; F16K11/10; F16K11/14; F16K11/16; F16K11/163; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/6198; Y10T137/6253; Y10T137/6307; Y10T137/8593; Y10T137/86493; Y10T137/86879
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) | 1920-05-21 | 1920-11-20 | 1921-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-05-21 | 1924-11-20 | 1925-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-05-21 | 1928-11-20 | 1929-05-22 | $7700.00 | Window Closed / Lapsed |