US2715664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control devices for electrically heated appliances
Assignee: Robertshaw Controls Co
•
Filing: 1953-12-21
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Granted: 1955-08-16
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Expires: 1973-12-21
Abstract
No abstract record available.
Inventors
- 👤 Russell F Garner
- 👤 William J Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:21
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0208; G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/27535; G05D23/27537; H01; H01H; H01H35/00; H01H35/24; H01H35/26; H01H35/2607
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) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |