US3489420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seal assembly
Assignee: Individual
•
Filing: 1968-03-04
•
Granted: 1970-01-13
•
Expires: 1988-03-04
Abstract
No abstract record available.
Inventors
- 👤 George V Woodling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:15
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3284; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2273962A
Cited
US2750212A
Cited
US2736585A
Cited
US2804324A
Cited
US2804325A
Cited
US3072413A
Cited
US3135518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |