Patent US902349A successfully refreshed from Google Patents.
Patent US3244141A successfully refreshed from Google Patents.
US3244141A
Expired / Lapsed
US
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Apparatus for obtaining metal carbide coating on base materials
Assignee: Old Carco LLC
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Filing: 1961-08-28
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Granted: 1966-04-05
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Expires: 1981-08-28
Abstract
No abstract record available.
Inventors
- 👤 Marx E Weech
- 👤 Donald E Theis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:41
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5053; C04B41/5057; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C23; C23C; C23C16/00; C23C16/04; C23C16/045; C23C16/22; C23C16/30; C23C16/32; C01; C01P; C01P2004/00; C01P2004/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
APPARATUS FOR PRODUCING METAL CARBIDE COATINGS ON BASE STRUCTURES COMPRISING AN ELECTRICALLY HEATED RESISTANCE FURNACE INCLUDING A TUBULAR CARBON RESISTANCE ELEMENT HAVING A HIGH ELECTRICAL RESISTANCE ZONE, CLOSURE MEANS AT THE OPPOSITE ENDS OF SAID TUBULAR ELEMENT, A VAPOR FEED STRUCTURE SUPPORTED BY ONE OF SAID CLOSURE MEANS AND EXTENDING INTO SAID HEATING CHAMBER ADJACENT SAID ZONE, MEANS
Claim 2
Dependent Claim
58 words
APPARATUS FOR PRODUCING METAL CARBIDE COATINGS ON BASE STRUCTURES COMPRISING AN ELECTRICALLY HEATED RESISTANCE FURNACE INCLUDING A TUBULAR CARBON RESISTANCE ELEMENT HAVING A HIGH ELECTRICAL RESISTANCE ZONE, CLOSURE MEANS AT THE OPPOSITE ENDS OF SAID TUBULAR ELEMENT, A VAPOR FEED STRUCTURE SUPPORTED BY ONE OF SAID CLOSURE MEANS AND EXTENDING INTO SAID HEATING CHAMBER ADJACENT SAID ZONE, MEANS
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |