US3123886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Assembly fom forming refractory tubes
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:14
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/34; B28B7/342; B28B21/00; B28B21/76; Y; Y10; Y10S; Y10S264/00; Y10S264/44; Y10S425/00; Y10S425/012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
AN ASSEMBLY FOR FORMING REFRACTORY TUBES WITH AN ACCURATE BORE COMPRISING A PAIR OF FLUID ABSORBENT, POROUS CONCENTRIC TUBES, MENS MOUNTED AT EACH END OF SAID CONCENTRIC TUBES TO MAINTAIN THEM IN FIXED SPACED RELATION TO ONE ANOTHER, SAID TUBES DEFINING AN ANNULAR SPACE BETWEEN THEIR OPPOSING SURFACES, RIGID MEANS WITHIN THE CENTRAL TUBE OF SAID PAIR AND IN CONTACT THEREWITH THROUGHOUT SUBSTNATIALLY ITS ENTIRE LENGTH, RIGID MEANS DISPOSED ALONG THE OUTER SURFACE OF THE OUTER TUBE AT CIRCUMFERENTIALLY SPACED INTERVALS AND IN CONTACT THEREWITH THROUGHOUT SUBSTANTIALLY ITS ENTIRE LENGTH, SAID PAIR OF FLUID ABBORBENT, POROUS CONCENTRIC TUBES BEING COMPOSED OF A MA-
Claim 2
Dependent Claim
103 words
AN ASSEMBLY FOR FORMING REFRACTORY TUBES WITH AN ACCURATE BORE COMPRISING A PAIR OF FLUID ABSORBENT, POROUS CONCENTRIC TUBES, MENS MOUNTED AT EACH END OF SAID CONCENTRIC TUBES TO MAINTAIN THEM IN FIXED SPACED RELATION TO ONE ANOTHER, SAID TUBES DEFINING AN ANNULAR SPACE BETWEEN THEIR OPPOSING SURFACES, RIGID MEANS WITHIN THE CENTRAL TUBE OF SAID PAIR AND IN CONTACT THEREWITH THROUGHOUT SUBSTNATIALLY ITS ENTIRE LENGTH, RIGID MEANS DISPOSED ALONG THE OUTER SURFACE OF THE OUTER TUBE AT CIRCUMFERENTIALLY SPACED INTERVALS AND IN CONTACT THEREWITH THROUGHOUT SUBSTANTIALLY ITS ENTIRE LENGTH, SAID PAIR OF FLUID ABBORBENT, POROUS CONCENTRIC TUBES BEING COMPOSED OF A MA-
References Cited (Backward Citations)
US114905A
Cited
CA493045A
Cited
US772259A
Cited
US935529A
Cited
US950567A
Cited
US1225182A
Cited
US1487212A
Cited
US2129680A
Cited
US2296018A
Cited
US2866250A
Cited
US2870515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |