US2974745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound-deadening air-intake devices
Assignee: HI PRESS AIR CONDITIONING OF A
•
Filing: 1954-01-14
•
Granted: 1961-03-14
•
Expires: 1974-01-14
Abstract
No abstract record available.
Inventors
- 👤 Kristiansen Svend Helge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:47
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/16; F24F13/24
Claims Analysis
Total Claims: 0
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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) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |