Patent US397735A successfully refreshed from Google Patents.
Patent US2902697A successfully refreshed from Google Patents.
US2902697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flushing device
Assignee: Individual
•
Filing: 1955-12-19
•
Granted: 1959-09-08
•
Expires: 1975-12-19
Abstract
No abstract record available.
Inventors
- 👤 Mcgovern Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:11
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/30; E03D1/304; E03D1/34; Y; Y10; Y10S; Y10S4/00; Y10S4/01
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2214439A
Cited
US2290679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |