US3395923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-lubricating stuffing box
Assignee: PHILLIPS PETROCLEUM Co
•
Filing: 1965-07-09
•
Granted: 1968-08-06
•
Expires: 1985-07-09
Abstract
No abstract record available.
Inventors
- 👤 Marvin A Remke
- 👤 Frank G Lyte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:45
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/184; F16J15/185; F16J15/186; E; E21; E21B; E21B33/00; E21B33/02; E21B33/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1603206A
Cited
US1585087A
Cited
US1594935A
Cited
US1805155A
Cited
US1877696A
Cited
US2538207A
Cited
US2628112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |