US2894681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal blower wheel structure
Assignee: Trane Co
•
Filing: 1955-04-15
•
Granted: 1959-07-14
•
Expires: 1975-04-15
Abstract
No abstract record available.
Inventors
- 👤 Lunde Einar
- 👤 William T Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:48
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281; F04D29/282; F04D29/283; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49236; Y10T29/49243
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2336231A
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US2258231A
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US2392113A
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US2458041A
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US2632397A
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US2711285A
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US2592851A
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US2724547A
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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) | 1962-07-13 | 1963-01-12 | 1963-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-13 | 1967-01-12 | 1967-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-13 | 1971-01-12 | 1971-07-14 | $7700.00 | Window Closed / Lapsed |