US2851016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic boiler condition measurement and control
Assignee: Yarnall Waring Co
•
Filing: 1954-02-01
•
Granted: 1958-09-09
•
Expires: 1974-02-01
Abstract
No abstract record available.
Inventors
- 👤 Walter J Kinderman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:51
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/42; B; B01; B01B; B01B1/00; F22D; F22D11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |