Patent US2829909A successfully refreshed from Google Patents.
US2829909A
Expired / Lapsed
US
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Packed sleeve-type coupling with multiple seals
Assignee: Individual
•
Filing: 1954-09-15
•
Granted: 1958-04-08
•
Expires: 1974-09-15
Abstract
No abstract record available.
Inventors
- 👤 Magnani Alessandro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:14
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/022; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB405717A
Cited
US2105747A
Cited
GB525153A
Cited
US2438529A
Cited
GB626968A
Cited
US2597482A
Cited
GB663255A
Cited
US2772100A
Cited
US2738992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |