Patent US3261529A successfully refreshed from Google Patents.
US3261529A
Expired / Lapsed
US
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Welding back-up device
Assignee: AMF Inc
•
Filing: 1963-05-21
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Granted: 1966-07-19
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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 19:45
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
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US2594000A
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US2613303A
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US2878770A
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US2887972A
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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 |