US3288979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graphite welding
Assignee: Individual
•
Filing: 1963-10-28
•
Granted: 1966-11-29
•
Expires: 1983-10-28
Abstract
No abstract record available.
Inventors
- 👤 Loring E Mills
- 👤 Richard F Boolen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:55
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/522; C01; C01B; C01B32/00; C04B35/622; C04B35/64; C04B35/645; C04B37/00; C04B37/001; G; G21; G21C; G21C3/00; G21C3/02; G21C3/04; G21C3/06; G21C3/10; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6567; C04B2235/66; C04B2235/666; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/363; C04B2237/50; C04B2237/66; C04B2237/76; C04B2237/765; C04B2237/78; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD OF WELDING A GRAPHITE-TO-GRAPHITE INTERFACE, COMPRISING EXERTING AN INITIAL PRESSURE OF ABOUT 14,000 P.S.I. ACROSS THE INTERFACE, AND WHILE CONTINUING SAID INITIAL PRESSURE, PASSING AN ALTERNATING ELECTRICAL CURRENT ACROSS SAID INTERFACE SO AS TO PRODUCE A PEAK CURRENT DENSITY OF FROM 310,000 TO 1,000,000 AMPERES PER SQUARE INCH OF INTERFACE THEREBY PRODUCING RESISTANCE HEATING, WHILE SIMULTANEOUSLY EXERTING A SECOND PRESSURE OF SUCH MAGNITUDE THAT THE TOTAL PRESSURE SHALL EQUAL ABOUT 15,000 P.S.I. ACROSS THE ENTIRE INTERFACE AS ENLARGED BY PLASTICITY DUE TO THE RESISTANCE HEATING.
Claim 2
Independent Claim
87 words
A METHOD OF WELDING A GRAPHITE-TO-GRAPHITE INTERFACE, COMPRISING EXERTING AN INITIAL PRESSURE OF ABOUT 14,000 P.S.I. ACROSS THE INTERFACE, AND WHILE CONTINUING SAID INITIAL PRESSURE, PASSING AN ALTERNATING ELECTRICAL CURRENT ACROSS SAID INTERFACE SO AS TO PRODUCE A PEAK CURRENT DENSITY OF FROM 310,000 TO 1,000,000 AMPERES PER SQUARE INCH OF INTERFACE THEREBY PRODUCING RESISTANCE HEATING, WHILE SIMULTANEOUSLY EXERTING A SECOND PRESSURE OF SUCH MAGNITUDE THAT THE TOTAL PRESSURE SHALL EQUAL ABOUT 15,000 P.S.I. ACROSS THE ENTIRE INTERFACE AS ENLARGED BY PLASTICITY DUE TO THE RESISTANCE HEATING.
References Cited (Backward Citations)
US3101403A
Cited
US3106596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |