Patent US2688683A successfully refreshed from Google Patents.
US2688683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulator for electrically heated hot plates
Assignee: Landis and Gyr AG
•
Filing: 1951-11-05
•
Granted: 1954-09-07
•
Expires: 1971-11-05
Abstract
No abstract record available.
Inventors
- 👤 Walthert Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:04
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0213
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2068425A
Cited
US2140362A
Cited
US2182048A
Cited
US2451225A
Cited
US2438345A
Cited
US2576836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |