US3373254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time switching device for controlling a heating system
Assignee: ZENTRA ALBERT BURKLE KG
•
Filing: 1966-01-24
•
Granted: 1968-03-12
•
Expires: 1986-01-24
Abstract
No abstract record available.
Inventors
- 👤 Berger Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:39
CPC Classifications
G; G04; G04C; G04C23/00; G04C23/02; G04C23/14; G04C23/16; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18288
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB683540A
Cited
US2599234A
Cited
US2770974A
Cited
US3113465A
Cited
US3188503A
Cited
US3320375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |