Patent US3016314A successfully refreshed from Google Patents.
US3016314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-treating metals
Assignee: Individual
•
Filing: 1958-08-13
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Granted: 1962-01-09
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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 10:03
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.
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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 |