US2970644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid dispersion conduit
Assignee: Individual
•
Filing: 1958-06-02
•
Granted: 1961-02-07
•
Expires: 1978-06-02
Abstract
No abstract record available.
Inventors
- 👤 Webster David Richan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:19
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1411224A
Cited
US2347850A
Cited
US2334612A
Cited
US2566449A
Cited
US2619011A
Cited
US2728271A
Cited
US2869436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |