Patent US3561298A successfully refreshed from Google Patents.
US3561298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable seal plug for closing the upper end of self-punching t fittings
Assignee: East 74Th Street Holdings Inc
•
Filing: 1969-04-09
•
Granted: 1971-02-09
•
Expires: 1989-04-09
Abstract
Abstract THIS INVENTION RELATES TO A REMOVABLE SEAL PLUG FOR CLOSING THE UPPER END OF A SELF-PUNCHING TO FITTING. MORE PARTICULARLY, THE INVENTION RELATES TO A SELF-PUNCHING T FITTING INCLUDING A TUBULAR BODY ADAPTED TO BE WELDED TO A PIPE, A PUNCH THREADABLY POSITIONED WITHIN THE TUBULAR BODY ADAPTABLE FOR ROTATION TO ENGAGE AND PUNCH A HOLE IN THE PIPE, AND AN IMPROVED SEAL PLUG MEMBER FOR CLOSING THE UPPER END OF THE TUBULAR BODY MEMBER, THE PLUG MEMBER SERVING TO ACCURATELY POSITION AND PREVENT THE MOVEMENT OF THE PUNCH MEMBER IN THE BODY AND TO SECURELY SEAL THE BODY AGAINST FLUID LEAKAGE.
Inventors
- 👤 Howard T De Graffenreid
- 👤 Judson C Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:13
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/04; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/612; Y10T137/6123
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |