US3444693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water wave suppression device
Assignee: McDonnell Douglas Corp
•
Filing: 1967-02-27
•
Granted: 1969-05-20
•
Expires: 1987-02-27
Abstract
No abstract record available.
Inventors
- 👤 Harold M Busey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:58
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/04; E02B3/06; E02B3/062; Y; Y02; Y02A; Y02A10/00; Y02A10/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US436644A
Cited
US1432530A
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US1846278A
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US2387965A
Cited
US2658350A
Cited
US2994201A
Cited
US3276209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |