US3121630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for sintering premolded objects
Assignee: WC Heraus GmbH and Co KG
•
Filing: 1959-11-09
•
Granted: 1964-02-18
•
Expires: 1979-11-09
Abstract
No abstract record available.
Inventors
- 👤 Bussard Adrien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:23
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A METHOD OF PRODUCING GAS-FREE SINTERED OBJECTS RELATIVELY LONGER THAN THE AREA IN WHICH IT IS SINTERED, COMPRISING THE STEPS OF SUPPORTING IN AN EVACUABLE VESSEL CONTAINING INDUCTION HEATING MEANS, A PREMOLDED OBJECT SUCH THAT THE PORTION BETWEEN THE ENDS THEREOF IS UNSUPPORTED, EVACUATING SAID VESSEL AND MAINTAINING A REQUIRED VACUUM IN SAID VESSEL, HEATING SAID OBJECT UNDER SAID VACUUM TO THE REQUIRED SINTERING TEMPERATURE CONSECUTIVELY AT DIFFERENT ZONES THEREOF BY MOVING SAID OBJECT AND SAID HEATING MEANS RELATIVE TO EACH OTHER, AND MAINTAINING THE OBJECT AT EACH ZONE AT THE SINTERING TEMPERATURE FOR THE PERIOD REQUIRED FOR SINTERING THE SAME.
Claim 2
Independent Claim
101 words
A METHOD OF PRODUCING GAS-FREE SINTERED OBJECTS RELATIVELY LONGER THAN THE AREA IN WHICH IT IS SINTERED, COMPRISING THE STEPS OF SUPPORTING IN AN EVACUABLE VESSEL CONTAINING INDUCTION HEATING MEANS, A PREMOLDED OBJECT SUCH THAT THE PORTION BETWEEN THE ENDS THEREOF IS UNSUPPORTED, EVACUATING SAID VESSEL AND MAINTAINING A REQUIRED VACUUM IN SAID VESSEL, HEATING SAID OBJECT UNDER SAID VACUUM TO THE REQUIRED SINTERING TEMPERATURE CONSECUTIVELY AT DIFFERENT ZONES THEREOF BY MOVING SAID OBJECT AND SAID HEATING MEANS RELATIVE TO EACH OTHER, AND MAINTAINING THE OBJECT AT EACH ZONE AT THE SINTERING TEMPERATURE FOR THE PERIOD REQUIRED FOR SINTERING THE SAME.
References Cited (Backward Citations)
US1816253A
Cited
US2225424A
Cited
US2739088A
Cited
US2746740A
Cited
US2930098A
Cited
US2807542A
Cited
US2792302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |