US2817847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flush tank attachment
Assignee: Individual
•
Filing: 1955-07-26
•
Granted: 1957-12-31
•
Expires: 1975-07-26
Abstract
No abstract record available.
Inventors
- 👤 Spencer Ewell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:13
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; E; E03; E03D; E03D1/00; E03D1/30; E03D1/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US980162A
Cited
US1125046A
Cited
US1269048A
Cited
US1518699A
Cited
US2295370A
Cited
US2465143A
Cited
US2707607A
Cited
US2625691A
Cited
US2720657A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |