US3395450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing useful gaps of accurately the same length throughout their width between two circuit parts of a magnetic head
Assignee: US Philips Corp
•
Filing: 1965-12-20
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Granted: 1968-08-06
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Expires: 1985-12-20
Abstract
No abstract record available.
Inventors
- 👤 Koorneef Jacob
- 👤 Beun Jacobus Pieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:46
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/06; G; G11; G11B; G11B5/00; G11B5/127; G11B5/1272; G11B5/187; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49055; Y10T29/49057; Y10T29/49826; Y10T29/49895
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3094772A
Cited
US3117367A
Cited
US3246383A
Cited
US3333332A
Cited
DE1167892B
Cited
US3340518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |