US1142771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating system.
Assignee: Individual
•
Filing: 1911-09-07
•
Granted: 1915-06-08
•
Expires: 1931-09-07
Abstract
No abstract record available.
Inventors
- 👤 William S Hadaway Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:56
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0227; H05B1/0252; H05B1/0275; H05B2214/00; H05B2214/02; Y; Y10; Y10S; Y10S52/00; Y10S52/07
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) | 1918-06-07 | 1918-12-07 | 1919-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1922-06-07 | 1922-12-07 | 1923-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1926-06-07 | 1926-12-07 | 1927-06-08 | $7700.00 | Window Closed / Lapsed |