US3531334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quench system
Assignee: Inland Steel Co
•
Filing: 1966-10-10
•
Granted: 1970-09-29
•
Expires: 1986-10-10
Abstract
No abstract record available.
Inventors
- 👤 Carlton F Schrader
- 👤 Harold L Taylor
- 👤 William E Heitmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:31
CPC Classifications
B; B21; B21B; B21B45/00; B21B45/02; B21B45/0203; B21B45/0209; B21B45/0215; B21B45/0218; C; C21; C21D; C21D1/00; C21D1/62; C21D1/667
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1697068A
Cited
US2009078A
Cited
US2307694A
Cited
US2542237A
Cited
US2657698A
Cited
US2658012A
Cited
US2893409A
Cited
US2900992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |