Patent US4291814A successfully refreshed from Google Patents.
US3533784A
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US
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Electrostatic reproduction method
Assignee: AB Dick Co
•
Filing: 1968-03-11
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Granted: 1970-10-13
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Expires: 1988-03-11
Abstract
No abstract record available.
Inventors
- 👤 Daniel B Granzow
- 👤 Stanley A Gawron
- 👤 William P Graff
- 👤 Pervis A Swain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:34
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2777957A
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US2932742A
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US2890343A
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US3137202A
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US3383209A
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US3287614A
Cited
US3308233A
Cited
US3381573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |