US2643324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating device
Assignee: Individual
•
Filing: 1951-09-19
•
Granted: 1953-06-23
•
Expires: 1971-09-19
Abstract
No abstract record available.
Inventors
- 👤 Goldstaub Heinz Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:26
CPC Classifications
B; B01; B01L; B01L7/00; A; A47; A47J; A47J36/00; A47J36/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US978892A
Cited
US1455287A
Cited
US2231506A
Cited
US2500241A
Cited
US2482665A
Cited
US2527864A
Cited
US2572695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |