US3534472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an electrical resistor
Assignee: US Philips Corp
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Filing: 1968-05-16
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Granted: 1970-10-20
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Expires: 1988-05-16
Abstract
No abstract record available.
Inventors
- 👤 Martijn De Jong
- 👤 Matheus Jeanne Gerardus Knapen
- 👤 Theodoor Peter Johannes Botden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:14
CPC Classifications
B; B44; B44B; B44B7/00; B23; B23K; B23K26/00; B23K26/08; B23K26/0823; H; H01; H01C; H01C17/00; H01C17/22; H01C17/24; H01C17/242; Y; Y10; Y10S; Y10S65/00; Y10S65/04; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |