US3145637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotype development apparatus
Assignee: GAF Chemicals Corp
•
Filing: 1960-07-12
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Granted: 1964-08-25
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Expires: 1980-07-12
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Frantz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:43
CPC Classifications
G; G03; G03D; G03D5/00; G03D5/06; G03D5/067; G03C; G03C5/00; G03C5/18; G03D13/00; G03D15/00; G03D15/02; G03D15/027; G03D7/00; G03D9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2333733A
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US2328781A
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US2437254A
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US2792700A
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US2789904A
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US3000287A
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US2981171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |