US3507679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled polarity liquid developer
Assignee: Australian Government
•
Filing: 1969-03-24
•
Granted: 1970-04-21
•
Expires: 1989-03-24
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Metcalfe
- 👤 Alwin S Clements
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:02
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/132; G03G9/125; G03G9/131; G03G9/135; G03G9/1355
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2809122A
Cited
US3010842A
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US2907674A
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US3032432A
Cited
US3001888A
Cited
US3198649A
Cited
US3105821A
Cited
US3123564A
Cited
US3241957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |