US2875275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable ratio photoelectric engraving machine
Assignee: Fairchild Semiconductor Corp
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Filing: 1954-05-10
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Granted: 1959-02-24
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Expires: 1974-05-10
Abstract
No abstract record available.
Inventors
- 👤 Frederick P Willcox
- 👤 Ludolph F Welanetz
- 👤 Reuben J Autere
- 👤 James S Hellen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:38
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/02; B41C1/04; H; H04; H04N; H04N1/00; H04N1/387; H04N1/393
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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |