US2602133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for heating materials dielectrically
Assignee: Armstrong World Industries Inc
•
Filing: 1950-05-23
•
Granted: 1952-07-01
•
Expires: 1970-05-23
Abstract
No abstract record available.
Inventors
- 👤 George E Gard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:27
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/46; H05B6/48
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-01 | 1955-12-31 | 1956-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-01 | 1959-12-31 | 1960-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-01 | 1963-12-31 | 1964-07-01 | $7700.00 | Window Closed / Lapsed |