US2616447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boiler feed control
Assignee: Individual
•
Filing: 1946-12-26
•
Granted: 1952-11-04
•
Expires: 1966-12-26
Abstract
No abstract record available.
Inventors
- 👤 Philip H Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:53
CPC Classifications
F; F22; F22D; F22D5/00; F22D5/24; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/265; Y10T137/2668; Y10T137/2673; Y10T137/2675; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7921; Y10T137/8593; Y10T137/87096
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US341203A
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US684893A
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US1020642A
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US1136642A
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US1737588A
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GB303275A
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US1940828A
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US2111430A
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US2221365A
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US2218700A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |