Patent US3100930A successfully refreshed from Google Patents.
US3100930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger tubing manufacture
Assignee: Baldwin Lima Hamilton Corp
•
Filing: 1960-11-30
•
Granted: 1963-08-20
•
Expires: 1980-11-30
Abstract
No abstract record available.
Inventors
- 👤 Arvid C K Nihlen
- 👤 Robert M Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:35
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/34; F28F1/36; B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/154; B21C37/22; B21C37/26; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929; Y10T29/49936; Y10T29/49938; Y10T29/4994; Y10T29/4998; Y10T29/49988
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
THE METHOD OF FORMING SHEATHED TUBING INCLUDING THE STEPS OF FORMING GROOVE MEANS IN A SURFACE OF A FIRST METAL TUBE WITH SAID GROOVE MEANS EXTENDING INWARDLY OF THE TUBE METAL FROM SAID TUBE SURFACE AND OPENING OUTWARDLY AT SAID TUBE SURFACE, EXTRUDING A SUBSTANTIALLY CONTINUOUS METAL SHEATHING TUBE TELESCOPED WITH THE FIRST TUBE SURFACE WITH SAID SHEATHING TUBE TIGHTLY ABUTTING THE FIRST TUBE SURFACE, AND DURING THE EXTRUDING OF THE SHEATHING TUBE TELESCOPED WITH THE FIRST TUBE SURFACE FORMING AND EMBEDDING PORTIONS OF THE SHEATHING TUBE INWARDLY INTO AND INTERLOCKING THE SHEATHING METAL WITH THE FIRST TUBE GROOVE MEANS THEREBY PROVIDING AN INTERLOCKING METAL-TO-METAL HEAT TRANSFER BOND BETWEEN SAID TUBES FOR MAINTAINING THE TUBES IN INTIMATE HEAT TRANSFER CONTACT UNDER VARYING TEMPERATURE CONDITIONS.
Claim 2
Independent Claim
124 words
THE METHOD OF FORMING SHEATHED TUBING INCLUDING THE STEPS OF FORMING GROOVE MEANS IN A SURFACE OF A FIRST METAL TUBE WITH SAID GROOVE MEANS EXTENDING INWARDLY OF THE TUBE METAL FROM SAID TUBE SURFACE AND OPENING OUTWARDLY AT SAID TUBE SURFACE, EXTRUDING A SUBSTANTIALLY CONTINUOUS METAL SHEATHING TUBE TELESCOPED WITH THE FIRST TUBE SURFACE WITH SAID SHEATHING TUBE TIGHTLY ABUTTING THE FIRST TUBE SURFACE, AND DURING THE EXTRUDING OF THE SHEATHING TUBE TELESCOPED WITH THE FIRST TUBE SURFACE FORMING AND EMBEDDING PORTIONS OF THE SHEATHING TUBE INWARDLY INTO AND INTERLOCKING THE SHEATHING METAL WITH THE FIRST TUBE GROOVE MEANS THEREBY PROVIDING AN INTERLOCKING METAL-TO-METAL HEAT TRANSFER BOND BETWEEN SAID TUBES FOR MAINTAINING THE TUBES IN INTIMATE HEAT TRANSFER CONTACT UNDER VARYING TEMPERATURE CONDITIONS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |