US3570109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joining method and apparatus therefor
Assignee: Individual
•
Filing: 1968-06-24
•
Granted: 1971-03-16
•
Expires: 1988-06-24
Abstract
Abstract AN IMPROVED METHOD FOR JOINING ABUTTING SURFACES OF ADJACENT MATERIALS WHEREIN A DAM MEMBER IS PLACED ON THE BACK SIDE OF THE ABUTTING SURFACES TO DEFINE, IN COMBINATION WITH THE ABUTTING SURFACES, A SPACE TO BE FILLED WITH FLUID JOINING MATTER, A NEGATIVE PRESSURE, RELATIVE TO THE AMBIENT PRESSURE ON THE FRONT (TORCH) SIDE OF THE WELD, BEING PROVIDED ON THE BACK SIDE OF THE ABUTTING MEMBERS TO FORCE COMPLETE FILLING OF AT LEAST A PART OF THE AREA DEFINED BY THE DAM AND ABUTTING MEMBERS. THE METHOD IS PARTICULARLY USEFUL IN JOINING LARGE DIAMETER PIPE.
Inventors
- 👤 Hubert B Harlan
- 👤 Paul W Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:03
CPC Classifications
B; B23; B23K; B23K37/00; B23K37/04; B23K37/053; B23K37/0531; B23K9/00; B23K9/02; B23K9/028; B23K9/0282
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |