US3001606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Lennox Industries Inc
•
Filing: 1958-04-21
•
Granted: 1961-09-26
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Expires: 1978-04-21
Abstract
No abstract record available.
Inventors
- 👤 Henry C Bierwirth
- 👤 Norman L Rutgers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:48
CPC Classifications
F; F24; F24F; F24F1/00; F24F1/02; F24F1/0328; F24F1/035; B; B01; B01D; B01D46/00; F24F8/00; F24F8/10; F24F8/108; Y; Y10; Y10S; Y10S261/00; Y10S261/41
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) | 1964-09-25 | 1965-03-27 | 1965-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-25 | 1969-03-27 | 1969-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-25 | 1973-03-27 | 1973-09-26 | $7700.00 | Window Closed / Lapsed |