US3457385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for dielectric heating
Assignee: Canadian Patents and Development Ltd
•
Filing: 1966-07-07
•
Granted: 1969-07-22
•
Expires: 1986-07-07
Abstract
No abstract record available.
Inventors
- 👤 William A Cumming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:27
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/78; H05B6/788; H05B2206/00; H05B2206/04; H05B2206/046
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2640142A
Cited
US3263052A
Cited
US3307010A
Cited
FR1452124A
Cited
US3321314A
Cited
FR1471131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |