US3524548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter medium for molten metal
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1968-09-16
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Granted: 1970-08-18
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Expires: 1988-09-16
Abstract
No abstract record available.
Inventors
- 👤 Howard A Mcdonald
- 👤 Robert C Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:41
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1315; B; B01; B01D; B01D29/00; B01D29/01; B01D29/03; B01D29/11; B01D29/31; B01D29/33; B01D29/50; B01D29/52; B01D39/00; B01D39/14; B01D39/20; B01D39/2068; B01D39/2072; B01D39/2075; C04B38/00; C22; C22B; C22B21/00; C22B21/06; C22B21/066; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1081573A
Cited
US1117601A
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US2021520A
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US2635991A
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US2804168A
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US2997402A
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US3235089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |