US2844163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backwater control device for sewers
Assignee: Individual
•
Filing: 1956-07-02
•
Granted: 1958-07-22
•
Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Steinberg Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:31
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/10; E03F5/105; E03F5/107; E03F7/00; E03F7/02; E03F7/04; F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/20; F16K31/24; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2577; Y10T137/7287; Y10T137/7358; Y10T137/7404
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE248033C
Cited
US1488604A
Cited
US2310677A
Cited
US2431640A
Cited
US2695072A
Cited
US2739662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |