US2660458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft or rod packing
Assignee: Individual
•
Filing: 1949-02-15
•
Granted: 1953-11-24
•
Expires: 1969-02-15
Abstract
No abstract record available.
Inventors
- 👤 Lawrence B Collins
- 👤 Clinton A Langstaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:46
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US556600A
Cited
US1209740A
Cited
US1603206A
Cited
US1586923A
Cited
US1902906A
Cited
US2035925A
Cited
US2192805A
Cited
US2258887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |