Patent US3521950A successfully refreshed from Google Patents.
US3521950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic reproducing apparatus
Assignee: Xerox Corp
•
Filing: 1967-04-21
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Granted: 1970-07-28
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Expires: 1987-04-21
Abstract
No abstract record available.
Inventors
- 👤 John F Gardner
- 👤 Thomas B Michaels
- 👤 Gordon P Taillie
- 👤 Donald W Gouldsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:32
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6529; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6207; G03B27/625; G03B27/6264; G03G15/22; G03G15/26; G03G15/263; G03G15/60; G03G15/6588; G03G15/6594; G06; G06K; G06K13/00; G06K13/02; G06K13/07; G06K13/08; G06K13/12; G03G2215/00; G03G2215/00172; G03G2215/00177; G03G2215/00181; G03G2215/00185; G03G2215/00362; G03G2215/00443; G03G2215/00451; G03G2215/00464; G03G2215/00472
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2741960A
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US2923212A
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US3011474A
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US3146688A
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US3187162A
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US3339469A
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US3299787A
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US3282177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |