US3182748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical vane for sound absorbing device and method of making said vane
Assignee: Garrett Corp
•
Filing: 1961-08-15
•
Granted: 1965-05-11
•
Expires: 1981-08-15
Abstract
No abstract record available.
Inventors
- 👤 Leslie S Wirt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:14
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/66; F04D29/661; F01; F01D; F01D25/00; F01D25/30; F05; F05D; F05D2250/00; F05D2250/20; F05D2250/25; F05D2260/00; F05D2260/96
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
47 words
A VANE, SAID VANE BEING FORMED OF SHEET METAL AND HAVING A RATIO OF A NORMALIZED LENGTH OF A HELICAL LINE ON THE VANE AT A CONSTANT RADIUS TO THE NORMALIZED RADIUS OF THE VANE OF BETWEEN 25 AND 8, AND SAID VANE CONFORMING TO THE FORMULA
References Cited (Backward Citations)
US1782396A
Cited
US2089242A
Cited
DE662470C
Cited
US2233592A
Cited
US2300130A
Cited
US2664062A
Cited
US2960950A
Cited
GB829012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |