Patent EP0462503A1 successfully refreshed from Google Patents.
US2961836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flood gate
Assignee: Individual
•
Filing: 1955-10-14
•
Granted: 1960-11-29
•
Expires: 1975-10-14
Abstract
No abstract record available.
Inventors
- 👤 Hanson William
- 👤 Charles W Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:04
CPC Classifications
E; E02; E02B; E02B11/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898; Y10T137/7902
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US130369A
Cited
US308739A
Cited
USRE17962E
Cited
US879542A
Cited
US1348562A
Cited
US1563154A
Cited
US1519073A
Cited
US1670520A
Cited
GB431214A
Cited
US2191066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |