US3016314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-treating metals
Assignee: Individual
•
Filing: 1958-08-13
•
Granted: 1962-01-09
•
Expires: 1978-08-13
Abstract
No abstract record available.
Inventors
- 👤 Kellermann Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:29
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/62; C21D1/63
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A METHOD OF HEAT TREATING SUCCESSIVE CHARGES OF METAL PARTS IN A CONTINUOUS OPERATION, COMPRISING THE STEPS OF INTRODUCING A FIRST ONE OF SAID CHARGES INTO A HEATING ZONE OF A TREATING CHAMBER; SEALING AND EVACUATING SAID CHAMBER; HEATING SAID FIRST CHARGE IN SAID HEATING ZONE TO A PREDETERMINED TEMPERATURE; TRANSFERRING SAID HEATED CHARGE TO A QUENCHING ZONE IN SAID CHAMBER SPACED FROM, BUT COMMUNICATING WITH, SAID HEATING ZONE; ADMITTING A LIQUID COOLANT TO SAID QUENCHING ZONE FOR DIRECT QUENCHING CONTACT WITH SAID HEATED CHARGE; REMOVING SAID COOLANT FROM SAID QUENCHING ZONE WHILE RETAINING THE QUENCHED CHARGE THEREIN; VACUUM SEALING SAID HEATING ZONE FROM SAID QUENCHING ZONE AFTER SAID CHARGE HAS BEEN TRANSFERRED; DISCHARGING SAID QUENCHED CHARGE FROM SAID QUENCHING ZONE AFTER SAID VACUUM SEALING; INTRODUCING A SECOND ONE OF SAID SUCCESSIVE CHARGES INTO SAID HEATING ZONE, AND REPEATING SAID STEPS.
Claim 2
Independent Claim
141 words
A METHOD OF HEAT TREATING SUCCESSIVE CHARGES OF METAL PARTS IN A CONTINUOUS OPERATION, COMPRISING THE STEPS OF INTRODUCING A FIRST ONE OF SAID CHARGES INTO A HEATING ZONE OF A TREATING CHAMBER; SEALING AND EVACUATING SAID CHAMBER; HEATING SAID FIRST CHARGE IN SAID HEATING ZONE TO A PREDETERMINED TEMPERATURE; TRANSFERRING SAID HEATED CHARGE TO A QUENCHING ZONE IN SAID CHAMBER SPACED FROM, BUT COMMUNICATING WITH, SAID HEATING ZONE; ADMITTING A LIQUID COOLANT TO SAID QUENCHING ZONE FOR DIRECT QUENCHING CONTACT WITH SAID HEATED CHARGE; REMOVING SAID COOLANT FROM SAID QUENCHING ZONE WHILE RETAINING THE QUENCHED CHARGE THEREIN; VACUUM SEALING SAID HEATING ZONE FROM SAID QUENCHING ZONE AFTER SAID CHARGE HAS BEEN TRANSFERRED; DISCHARGING SAID QUENCHED CHARGE FROM SAID QUENCHING ZONE AFTER SAID VACUUM SEALING; INTRODUCING A SECOND ONE OF SAID SUCCESSIVE CHARGES INTO SAID HEATING ZONE, AND REPEATING SAID STEPS.
References Cited (Backward Citations)
US1634319A
Cited
US1644828A
Cited
US1876960A
Cited
US2075385A
Cited
US2095198A
Cited
US2494361A
Cited
US2878008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-08 | 1965-07-10 | 1966-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-08 | 1969-07-10 | 1970-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-08 | 1973-07-10 | 1974-01-09 | $7700.00 | Window Closed / Lapsed |