US2147604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating system
Assignee: Honeywell Inc
•
Filing: 1935-04-15
•
Granted: 1939-02-14
•
Expires: 1955-04-15
Abstract
No abstract record available.
Inventors
- 👤 John P Kriechbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:19
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/1927; G05D23/193; G05D23/1931
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-02-13 | 1942-08-15 | 1943-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-02-13 | 1946-08-15 | 1947-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-02-13 | 1950-08-15 | 1951-02-14 | $7700.00 | Window Closed / Lapsed |