US3436255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric resistance heaters
Assignee: Monsanto Co
•
Filing: 1965-07-06
•
Granted: 1969-04-01
•
Expires: 1985-07-06
Abstract
No abstract record available.
Inventors
- 👤 Darrel M Harris
- 👤 Donald E Westhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:29
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0431; H10P72/0432; C; C30; C30B; C30B25/00; C30B25/02; C30B25/12; H05; H05B; H05B3/00; H05B3/10; H05B3/12; H05B3/14; H05B3/148; Y; Y10; Y10S; Y10S148/00; Y10S148/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2456708A
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US2420724A
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US2453141A
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US2532971A
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US3151006A
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US3164489A
Cited
US3329527A
Cited
FR1379897A
Cited
US3351742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |