USRE26885E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance heating elements and method of conditioning the heating surfaces thereof
Assignee: —
•
Filing: 1968-12-23
•
Granted: 1970-05-19
•
Expires: 1988-12-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:06
CPC Classifications
C; C30; C30B; C30B25/00; C30B25/02; C30B25/12; C23; C23C; C23C16/00; C23C16/22; H; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/145; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2902; Y10T428/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |