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 19:11
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.
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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 |