US3422956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wash flow
Assignee: RTX Corp
•
Filing: 1966-12-01
•
Granted: 1969-01-21
•
Expires: 1986-12-01
Abstract
No abstract record available.
Inventors
- 👤 Edward H Hadden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:43
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/147; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/17; Y; Y10; Y10S; Y10S251/00; Y10S251/902
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) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |