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US3174697A
Expired / Lapsed
US
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Impeller
Assignee: ADAMS ENGINEERING
•
Filing: 1962-07-30
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Granted: 1965-03-23
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Expires: 1982-07-30
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Bridgewater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:14
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/14; B02C13/18; B02C13/1807; B02C13/1835; B02C13/1842
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE688169C
Cited
US2992783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |