US2987053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced feed water system for steam generators
Assignee: Clayton Manufacturing Co
•
Filing: 1954-05-27
•
Granted: 1961-06-06
•
Expires: 1974-05-27
Abstract
No abstract record available.
Inventors
- 👤 Arant Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:06
CPC Classifications
F; F22; F22B; F22B29/00; F22B29/06; F22B29/08; F22D; F22D11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR721277A
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US2800196A
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US2707459A
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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) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |