Patent US3420083A successfully refreshed from Google Patents.
US3420083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller pressure high intensity quench systems
Assignee: Drever Co
•
Filing: 1967-12-08
•
Granted: 1969-01-07
•
Expires: 1987-12-08
Abstract
No abstract record available.
Inventors
- 👤 Franklin C Safford
- 👤 Robert A Mcgrath
- 👤 Edgar Lloyd Loveless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:04
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/62; C21D1/667; B; B21; B21B; B21B45/00; B21B45/02; B21B45/0203; B21B45/0209; B21B45/0215; B21B45/0218
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1761199A
Cited
US2616437A
Cited
US2776230A
Cited
US2871529A
Cited
US2900992A
Cited
US3036825A
Cited
US3041686A
Cited
US3208742A
Cited
US3140964A
Cited
US3151197A
Cited
US3367804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |