US2945681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating sector seals
Assignee: Alstom Power Inc
•
Filing: 1956-04-19
•
Granted: 1960-07-19
•
Expires: 1976-04-19
Abstract
No abstract record available.
Inventors
- 👤 Arden L Burchfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:06
CPC Classifications
F; F28; F28D; F28D19/00; F28D19/04; F28D19/047; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10S165/02; Y10S165/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE491920C
Cited
US1652025A
Cited
US2517470A
Cited
US2744731A
Cited
US2678228A
Cited
FR1088412A
Cited
US2873952A
Cited
US2852234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |