US2713301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet metal chimney construction
Assignee: Individual
•
Filing: 1953-04-30
•
Granted: 1955-07-19
•
Expires: 1973-04-30
Abstract
No abstract record available.
Inventors
- 👤 Henry S Mckann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:51
CPC Classifications
F; F23; F23L; F23L17/00; F23L17/02; F24; F24F; F24F7/00
Claims Analysis
Total Claims: 0
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US2634720A
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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) | 1958-07-18 | 1959-01-17 | 1959-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-18 | 1963-01-17 | 1963-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-18 | 1967-01-17 | 1967-07-19 | $7700.00 | Window Closed / Lapsed |