US2073835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flush tank apparatus
Assignee: Individual
•
Filing: 1935-11-11
•
Granted: 1937-03-16
•
Expires: 1955-11-11
Abstract
No abstract record available.
Inventors
- 👤 Walter H Finley
- 👤 Charles H Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:54
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/02; E03D1/06; E03D1/08; E03D1/082; E03D1/087; Y; Y10; Y10S; Y10S137/00; Y10S137/906; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2842; Y10T137/2863; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371; Y10T137/7439; Y10T137/7462; Y10T137/8593; Y10T137/877; Y10T137/87829; Y10T137/87837; Y10T137/87861
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) | 1940-03-15 | 1940-09-14 | 1941-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-03-15 | 1944-09-14 | 1945-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-03-15 | 1948-09-14 | 1949-03-16 | $7700.00 | Window Closed / Lapsed |