Patent US2207809A successfully refreshed from Google Patents.
US2207809A
Expired / Lapsed
US
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Feed-water system
Assignee: Republic Flow Meters Co
•
Filing: 1938-04-02
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Granted: 1940-07-16
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Expires: 1958-04-02
Abstract
No abstract record available.
Inventors
- 👤 Lauffer William George
- 👤 Henry R Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:13
CPC Classifications
F; F22; F22D; F22D11/00; F22D11/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/8158; Y10T137/8175; Y10T137/8326; Y10T137/8593; Y10T137/85978; Y10T137/86131; Y10T137/86139
Claims Analysis
Total Claims: 0
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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) | 1943-07-16 | 1944-01-15 | 1944-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-07-16 | 1948-01-15 | 1948-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-07-16 | 1952-01-15 | 1952-07-16 | $7700.00 | Window Closed / Lapsed |