US3494026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for manufacturing magnetic heads
Assignee: Panasonic Holdings Corp
•
Filing: 1967-06-23
•
Granted: 1970-02-10
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Expires: 1987-06-23
Abstract
No abstract record available.
Inventors
- 👤 Hiroshi Sugaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:17
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/133; G11B5/187; G11B5/23; G11B5/235; Y; Y10; Y10S; Y10S228/00; Y10S228/903; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49055; Y10T29/49057
Claims Analysis
Total Claims: 0
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US2561520A
Cited
US2343218A
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US2431540A
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US2500748A
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US3004325A
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US2883566A
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US2794942A
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US2949376A
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US3104455A
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US3187411A
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US3188400A
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US3283396A
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US3222626A
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US3246383A
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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) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |