US2824942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature regulating device
Assignee: HUGH ENGELHARDT
•
Filing: 1955-10-28
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Granted: 1958-02-25
•
Expires: 1975-10-28
Abstract
No abstract record available.
Inventors
- 👤 Engelhardt Hugo
- 👤 Howard R Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:33
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0211
Claims Analysis
Total Claims: 0
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US2728843A
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US2731615A
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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) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |