US2606017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace roof and wall structure
Assignee: Individual
•
Filing: 1949-02-05
•
Granted: 1952-08-05
•
Expires: 1969-02-05
Abstract
No abstract record available.
Inventors
- 👤 Levi S Longenecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:16
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/02; F27D1/021; F27D1/0003; F27D1/0023; F27D1/0026
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) | 1955-08-05 | 1956-02-04 | 1956-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-05 | 1960-02-04 | 1960-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-05 | 1964-02-04 | 1964-08-05 | $7700.00 | Window Closed / Lapsed |