US3261529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding back-up device
Assignee: AMF Inc
•
Filing: 1963-05-21
•
Granted: 1966-07-19
•
Expires: 1983-05-21
Abstract
No abstract record available.
Inventors
- 👤 Augustine J Pagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:23
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
AN INTERNAL PIPE ALIGNMENT DEVICE COMPRISING A. A C-SHAPED RING; B. MEANS FOR EXPANDING SAID RING INTO ENGAGEMENT WITH THE INSIDE OF A PIPE; C. A RING SEGMENT DIMENSIONED TO FIT BETWEEN THE ENDS OF SAID C-SHAPED RING AFTER THE LATTER IS EXPANDED; AND D. MEANS FOR MOVING SAID SEGMENT INTO POSITION BETWEEN SAID RING ENDS AFTER THE RING IS EXPANDED.
Claim 2
Dependent Claim
61 words
AN INTERNAL PIPE ALIGNMENT DEVICE COMPRISING A. A C-SHAPED RING; B. MEANS FOR EXPANDING SAID RING INTO ENGAGEMENT WITH THE INSIDE OF A PIPE; C. A RING SEGMENT DIMENSIONED TO FIT BETWEEN THE ENDS OF SAID C-SHAPED RING AFTER THE LATTER IS EXPANDED; AND D. MEANS FOR MOVING SAID SEGMENT INTO POSITION BETWEEN SAID RING ENDS AFTER THE RING IS EXPANDED.
References Cited (Backward Citations)
US1733957A
Cited
US2594000A
Cited
US2613303A
Cited
US2878770A
Cited
US2887972A
Cited
US3165082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |