Patent US2453249A successfully refreshed from Google Patents.
US2453249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for centrifugal pumps
Assignee: Individual
•
Filing: 1944-02-10
•
Granted: 1948-11-09
•
Expires: 1964-02-10
Abstract
No abstract record available.
Inventors
- 👤 Murphy Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:41
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/12; F04D29/126
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US664445A
Cited
FR664854A
Cited
GB322711A
Cited
US1931723A
Cited
US1897280A
Cited
US2027505A
Cited
GB458262A
Cited
US2236902A
Cited
US2347118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-09 | 1952-05-10 | 1952-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-09 | 1956-05-10 | 1956-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-09 | 1960-05-10 | 1960-11-09 | $7700.00 | Window Closed / Lapsed |