US3389996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-component heat developable diazotypes
Assignee: GAF Chemicals Corp
•
Filing: 1964-10-15
•
Granted: 1968-06-25
•
Expires: 1984-10-15
Abstract
No abstract record available.
Inventors
- 👤 Walter J Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:27
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03C1/61
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3123472A
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GB875307A
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US3207603A
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US3102812A
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US3202510A
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US3316092A
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US3298834A
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US3301679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |