US3391270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric resistance heaters
Assignee: Monsanto Co
•
Filing: 1965-07-27
•
Granted: 1968-07-02
•
Expires: 1985-07-27
Abstract
No abstract record available.
Inventors
- 👤 Darrel M Harris
- 👤 Henry H Buchter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:03
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/02; C; C30; C30B; C30B25/00; C30B25/02; C30B25/12; Y; Y10; Y10S; Y10S118/00; Y10S118/90
Claims Analysis
Total Claims: 0
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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) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |