US2719737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seal
Assignee: Individual
•
Filing: 1950-02-09
•
Granted: 1955-10-04
•
Expires: 1970-02-09
Abstract
No abstract record available.
Inventors
- 👤 Albert E Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:18
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/002; F16J15/008; B; B63; B63H; B63H23/00; B63H23/32; B63H23/321
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2556393A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |