Patent US3441293A successfully refreshed from Google Patents.
US3441293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe coupling
Assignee: Individual
•
Filing: 1967-07-03
•
Granted: 1969-04-29
•
Expires: 1987-07-03
Abstract
No abstract record available.
Inventors
- 👤 Luigi Bagnulo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:45
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/02; F16L25/03; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49917; Y10T29/49918
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA745513A
Cited
US997087A
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US1284145A
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US2195559A
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US2316690A
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US2661500A
Cited
CH360554A
Cited
GB870952A
Cited
US2998269A
Cited
NL6400224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |