US3173605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan housing
Assignee: Rotron Manufacturing Co Inc
•
Filing: 1963-06-21
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Granted: 1965-03-16
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Expires: 1983-06-21
Abstract
No abstract record available.
Inventors
- 👤 Dwight E Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:31
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/541; F04D29/545; F04D29/547; F01; F01D; F01D11/00; F01D11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
AN ANNULAR FAN HOUSING INSERT HAVING A DIVERGING INNER SURFACE AND A RIGHT CIRCULAR CYLINDRICAL OUTER SURFACE, A RESILIENT FINGER ALONG SAID OUTER SURFACE, SAID FINGER BEING FORMED BY TWO SIDE CUTS INTO SAID OUTER SURFACE AND AN UNDERCUT AREA BENEATH SAID FINGER, WHEREBY THE OUTER SURFACE OF SAID FINGER IS A PART OF SAID OUTER SURFACE OF SAID INSERT, SAID FINGER INCLUDING A PROJECTION EXTENDING ABOVE SAID OUTER SURFACE OF SAID INSERT.
Claim 2
Dependent Claim
73 words
AN ANNULAR FAN HOUSING INSERT HAVING A DIVERGING INNER SURFACE AND A RIGHT CIRCULAR CYLINDRICAL OUTER SURFACE, A RESILIENT FINGER ALONG SAID OUTER SURFACE, SAID FINGER BEING FORMED BY TWO SIDE CUTS INTO SAID OUTER SURFACE AND AN UNDERCUT AREA BENEATH SAID FINGER, WHEREBY THE OUTER SURFACE OF SAID FINGER IS A PART OF SAID OUTER SURFACE OF SAID INSERT, SAID FINGER INCLUDING A PROJECTION EXTENDING ABOVE SAID OUTER SURFACE OF SAID INSERT.
References Cited (Backward Citations)
US1867809A
Cited
GB441706A
Cited
US2100946A
Cited
FR975879A
Cited
CH313026A
Cited
US2763426A
Cited
US2861829A
Cited
US2930521A
Cited
US2879936A
Cited
GB791568A
Cited
US3042365A
Cited
US3068016A
Cited
US2994472A
Cited
US2982586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |