US3269364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic adjustable electric control of mineral contents for blowdown in a boiler
Assignee: Individual
•
Filing: 1964-03-03
•
Granted: 1966-08-30
•
Expires: 1984-03-03
Abstract
No abstract record available.
Inventors
- 👤 Bradley C Higgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:59
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/28; F22B1/30; F22B37/00; F22B37/02; F22B37/42; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7306
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |