US1698947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-sealing apparatus for steam-power plants
Assignee: FARMERS NAT BANK
•
Filing: 1924-11-25
•
Granted: 1929-01-15
•
Expires: 1944-11-25
Abstract
No abstract record available.
Inventors
- 👤 Charles A French
- 👤 Russell R Waterman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:41
CPC Classifications
F; F01; F01K; F01K9/00; F01K9/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2617; Y10T137/8593; Y10T137/85978; Y10T137/85986; Y10T137/86002
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1932-01-15 | 1932-07-16 | 1933-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-01-15 | 1936-07-16 | 1937-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-01-15 | 1940-07-16 | 1941-01-15 | $7700.00 | Window Closed / Lapsed |