US3522181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic developer
Assignee: Dow Chemical Co
•
Filing: 1966-11-07
•
Granted: 1970-07-28
•
Expires: 1986-11-07
Abstract
No abstract record available.
Inventors
- 👤 Walter L Garrett
- 👤 Henderson C Gillespie
- 👤 Louis J Sciambi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:49
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/132; G03G9/135; G03G9/1355; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2564926A
Cited
US2907674A
Cited
US3110683A
Cited
US3150976A
Cited
US3241998A
Cited
US3247148A
Cited
US3291138A
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 |