US2608380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seal for low-temperature expansion engines
Assignee: Union Carbide Corp
•
Filing: 1947-12-03
•
Granted: 1952-08-26
•
Expires: 1967-12-03
Abstract
No abstract record available.
Inventors
- 👤 Philip K Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:56
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/02; F01D11/04; F16; F16J; F16J15/00; F16J15/16; F16J15/40; Y; Y10; Y10S; Y10S277/00; Y10S277/918
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1057656A
Cited
US813723A
Cited
US811642A
Cited
US1188189A
Cited
US1559182A
Cited
US1840127A
Cited
US2077038A
Cited
US2133879A
Cited
US2155218A
Cited
US2205892A
Cited
US2159057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |