Patent US2623565A successfully refreshed from Google Patents.
US2623565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tank
Assignee: Individual
•
Filing: 1950-05-19
•
Granted: 1952-12-30
•
Expires: 1970-05-19
Abstract
No abstract record available.
Inventors
- 👤 Unthank Douglas George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:20
CPC Classifications
B; B63; B63B; B63B25/00; B63B25/02; Y; Y10; Y10S; Y10S220/00; Y10S220/905
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US357657A
Cited
US754222A
Cited
US875266A
Cited
US1119429A
Cited
US1161336A
Cited
US1636186A
Cited
US1928976A
Cited
US2019636A
Cited
US2171567A
Cited
GB557857A
Cited
US2378126A
Cited
US2391374A
Cited
US2430905A
Cited
US2476531A
Cited
US2492699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |