US3270697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a pipe centering device
Assignee: B&W Inc
•
Filing: 1962-10-02
•
Granted: 1966-09-06
•
Expires: 1982-10-02
Abstract
No abstract record available.
Inventors
- 👤 James R Solum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:29
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1014; E21B17/1021; E21B17/1028; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A METHOD OF FORMING A CENTRALIZED HAVING A PAIR OF SPACED CYLINDRICAL COLLARS AND A PLURALITY OF CIRCUMFERENTIALLY SPACED AND OUTWARDLY BOWED STAVES EXTENDING BETWEEN SAID COLLARS, COMPRISING THE STEPS OF: FORMING A FLAT BLANK HAVING A PAIR OF SPACED PANELS AND A PLURALITY OF SPACED RIBS EXTENDING BETWEEN AND INTEGRALLY JOINED TO SAID PANELS, FORMING EACH OF SAID PANELS INTO A CYLINDER HAVING ABUTTING ENDS AND EACH OF WHOSE AXIS IS SUBSTANTIALLY ALIGNED WITH THE OTHER, SAID RIBS EXTENDING LONGITUDINALLY BETWEEN SAID CYLINDERS, CONFINING SAID PANELS TO THEIR CYLINDRICAL SHAPE AND URGING SAID PANELS AXIALLY TOWARD EACH OTHER AND FORCING SAID RIBS OUTWARDLY BY MEANS OF INTERNAL DIES INTO ENGAGEMENT WITH MATING CONFINING DIES FOR FORMING THE PROFILE OF THE CENTRALIZER STAVES, AND JOINING SAID ABUTTING ENDS OF EACH CYLINDER FOR FORMING THE CYLINDRICAL COLLARS.
Claim 2
Independent Claim
136 words
A METHOD OF FORMING A CENTRALIZED HAVING A PAIR OF SPACED CYLINDRICAL COLLARS AND A PLURALITY OF CIRCUMFERENTIALLY SPACED AND OUTWARDLY BOWED STAVES EXTENDING BETWEEN SAID COLLARS, COMPRISING THE STEPS OF: FORMING A FLAT BLANK HAVING A PAIR OF SPACED PANELS AND A PLURALITY OF SPACED RIBS EXTENDING BETWEEN AND INTEGRALLY JOINED TO SAID PANELS, FORMING EACH OF SAID PANELS INTO A CYLINDER HAVING ABUTTING ENDS AND EACH OF WHOSE AXIS IS SUBSTANTIALLY ALIGNED WITH THE OTHER, SAID RIBS EXTENDING LONGITUDINALLY BETWEEN SAID CYLINDERS, CONFINING SAID PANELS TO THEIR CYLINDRICAL SHAPE AND URGING SAID PANELS AXIALLY TOWARD EACH OTHER AND FORCING SAID RIBS OUTWARDLY BY MEANS OF INTERNAL DIES INTO ENGAGEMENT WITH MATING CONFINING DIES FOR FORMING THE PROFILE OF THE CENTRALIZER STAVES, AND JOINING SAID ABUTTING ENDS OF EACH CYLINDER FOR FORMING THE CYLINDRICAL COLLARS.
References Cited (Backward Citations)
US1446487A
Cited
US1394925A
Cited
US1475344A
Cited
US1664669A
Cited
US1800642A
Cited
US1991988A
Cited
US1982400A
Cited
US2009496A
Cited
US2360724A
Cited
US2727576A
Cited
US2927953A
Cited
US3072195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |