Patent US2533286A successfully refreshed from Google Patents.
Patent US3406044A successfully refreshed from Google Patents.
US3406044A
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Resistance heating elements and method of conditioning the heating surfaces thereof
Assignee: Monsanto Co
•
Filing: 1965-01-04
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Granted: 1968-10-15
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Expires: 1985-01-04
Abstract
No abstract record available.
Inventors
- 👤 Darrel M Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:05
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; H; H01; H01B; H01B1/00; H01B1/04; 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)
US2614947A
Cited
US3099534A
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US2922722A
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US3019128A
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US2992127A
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US3095316A
Cited
US3078328A
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US3164489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |