US2617864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature-responsive control system for operating heat metering devices or the like
Assignee: Individual
•
Filing: 1946-10-11
•
Granted: 1952-11-11
•
Expires: 1966-10-11
Abstract
No abstract record available.
Inventors
- 👤 Henry H Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:08
CPC Classifications
G; G05; G05B; G05B11/00; G05B11/01; G05B11/012; G05B11/013; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084
Claims Analysis
Total Claims: 0
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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) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |