US2880982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum furnace
Assignee: Bendix Aviation Corp
•
Filing: 1955-12-19
•
Granted: 1959-04-07
•
Expires: 1975-12-19
Abstract
No abstract record available.
Inventors
- 👤 Robert H Kuhnapfel
- 👤 John H Wyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:57
CPC Classifications
F; F27; F27B; F27B5/00; F27B5/04; H; H01; H01J; H01J19/00; H01J19/70
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US539658A
Cited
US2269838A
Cited
US2493911A
Cited
US2416412A
Cited
US2624641A
Cited
US2701712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |