US2543615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas seal for rotating shafts
Assignee: CLARK BROS Co Inc
•
Filing: 1947-04-24
•
Granted: 1951-02-27
•
Expires: 1967-04-24
Abstract
No abstract record available.
Inventors
- 👤 William E Trumpler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:37
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/26; F16J15/30; F01; F01D; F01D11/00; F01D11/02; F16J15/44
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |