US3071500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hood-type annealing furnace
Assignee: Individual
•
Filing: 1957-09-09
•
Granted: 1963-01-01
•
Expires: 1977-09-09
Abstract
No abstract record available.
Inventors
- 👤 Robert L Corbett
- 👤 Jr Robert L Corbett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:31
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE PROCESS OF ANNEALING A METAL OF A STRIP COIL COMPRISING, IN SEQUENTIAL STEPS, PLACING A HOOD-TYPE FURNACE OVER SAID CHARGE AND HEATING SAID CHARGE TO AN ANNEALING TEMPERATURE, REMOVING AN UPPERMOST PORTION OF SAID FURNACE AND EXPOSING THE STRIP COIL TO THE ATMOSPHERE WHILE LEAVING A LOWER PORTION THEREOF PROTECTIVELY SURROUNDING SAID CHARGE, PLACING A COOLING BELL OVER SAID CHARGE WITHIN SAID LOWER PORTION OF THE FURNACE, REMOVING SAID LOWER PORTION OF SAID FURNACE, AND SUBSEQUENTLY ALLOWING SAID COOLING BELL TO REMAIN IN PLACE UNTIL SAID CHARGE HAS COOLED.
Claim 2
Dependent Claim
90 words
THE PROCESS OF ANNEALING A METAL OF A STRIP COIL COMPRISING, IN SEQUENTIAL STEPS, PLACING A HOOD-TYPE FURNACE OVER SAID CHARGE AND HEATING SAID CHARGE TO AN ANNEALING TEMPERATURE, REMOVING AN UPPERMOST PORTION OF SAID FURNACE AND EXPOSING THE STRIP COIL TO THE ATMOSPHERE WHILE LEAVING A LOWER PORTION THEREOF PROTECTIVELY SURROUNDING SAID CHARGE, PLACING A COOLING BELL OVER SAID CHARGE WITHIN SAID LOWER PORTION OF THE FURNACE, REMOVING SAID LOWER PORTION OF SAID FURNACE, AND SUBSEQUENTLY ALLOWING SAID COOLING BELL TO REMAIN IN PLACE UNTIL SAID CHARGE HAS COOLED.
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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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |