US2994549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packing glands
Assignee: Individual
•
Filing: 1958-07-11
•
Granted: 1961-08-01
•
Expires: 1978-07-11
Abstract
No abstract record available.
Inventors
- 👤 Sheridan P Tschappat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:27
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/08; F; F04; F04B; F04B53/00; F04B53/16; F04B53/162; F04B53/164; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/20
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) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |