US2507039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deicing device for roofs
Assignee: Individual
•
Filing: 1947-12-12
•
Granted: 1950-05-09
•
Expires: 1967-12-12
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:01
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/10; E04D13/103; E04D13/04; E04D13/076; E04D13/0762; H; H05; H05B; H05B3/00; H05B2214/00; H05B2214/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |