US1756444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating means
Assignee: Schutte and Koerting Co
•
Filing: 1929-02-07
•
Granted: 1930-04-29
•
Expires: 1949-02-07
Abstract
No abstract record available.
Inventors
- 👤 Brockdorff Rudolf Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
F; F24; F24C; F24C7/00; F24C7/06; F24C7/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-04-28 | 1933-10-28 | 1934-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-04-28 | 1937-10-28 | 1938-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-04-28 | 1941-10-28 | 1942-04-29 | $7700.00 | Window Closed / Lapsed |