US2536235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable chimney top
Assignee: Individual
•
Filing: 1947-06-25
•
Granted: 1951-01-02
•
Expires: 1967-06-25
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Steelman
- 👤 Joseph H Steelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:47
CPC Classifications
F; F23; F23L; F23L17/00; F23L17/02; F23L17/10
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-01 | 1954-07-03 | 1955-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-01 | 1958-07-03 | 1959-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-01 | 1962-07-03 | 1963-01-02 | $7700.00 | Window Closed / Lapsed |