US2591975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toilet flush tank refill device
Assignee: Individual
•
Filing: 1950-09-09
•
Granted: 1952-04-08
•
Expires: 1970-09-09
Abstract
No abstract record available.
Inventors
- 👤 Southwick Orion Emory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:31
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/02; E; E03; E03D; E03D1/00; E03D1/30; E03D1/32; F16K31/00; F16K31/12; F16K31/18; F16K31/20; F16K31/24; F16K31/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |