Patent US5146898A successfully refreshed from Google Patents.
Patent US2563903A successfully refreshed from Google Patents.
Patent US2067768A successfully refreshed from Google Patents.
Patent US2191045A successfully refreshed from Google Patents.
Patent US5276706A successfully refreshed from Google Patents.
Patent US3010067A successfully refreshed from Google Patents.
Patent US2553838A successfully refreshed from Google Patents.
US2553838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for suspending and sealing casings
Assignee: Cooper Industries LLC
•
Filing: 1948-12-04
•
Granted: 1951-05-22
•
Expires: 1968-12-04
Abstract
No abstract record available.
Inventors
- 👤 Allen Herbert
- 👤 Madden T Works
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:30
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/0422
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2312487A
Cited
US2485497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |