Patent US2993111A successfully refreshed from Google Patents.
US2993111A
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US
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Manufacture of electric resistance elements
Assignee: Kanthal AB
•
Filing: 1958-04-09
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Granted: 1961-07-18
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Expires: 1978-04-09
Abstract
No abstract record available.
Inventors
- 👤 Schrewelius Nils Gustav
- 👤 Amberg Styrbjorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:52
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/02; H05B3/06; Y; Y10; Y10S; Y10S228/00; Y10S228/903; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/1209; Y10T428/12104; Y10T428/12111; Y10T428/12229; Y10T428/12271; Y10T428/12278
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1867028A
Cited
US1896853A
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US2175899A
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US2413043A
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US2622304A
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US2857297A
Cited
US2770029A
Cited
GB776970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |