US1718412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heater
Assignee: CROOKER
•
Filing: 1925-02-06
•
Granted: 1929-06-25
•
Expires: 1945-02-06
Abstract
No abstract record available.
Inventors
- 👤 Edwin R Crooker
- 👤 Harry C Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:37
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0227; H05B1/0252; H05B1/0275; H05B1/0277; A; A47; A47C; A47C21/00; A47C21/04; A47C21/048
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) | 1932-06-24 | 1932-12-24 | 1933-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-06-24 | 1936-12-24 | 1937-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-06-24 | 1940-12-24 | 1941-06-25 | $7700.00 | Window Closed / Lapsed |