US3442441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supersonic cascades
Assignee: Individual
•
Filing: 1967-07-20
•
Granted: 1969-05-06
•
Expires: 1987-07-20
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm Dettmering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:41
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/141; F01D5/146; F01D5/142; F04; F04D; F04D21/00; F05; F05D; F05D2240/00; F05D2240/20; F05D2240/30; F05D2240/302; Y; Y10; Y10S; Y10S415/00; Y10S415/914
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) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |