US3397630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotype copying apparatus
Assignee: GAF Corp
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Filing: 1965-06-15
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Granted: 1968-08-20
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Expires: 1985-06-15
Abstract
No abstract record available.
Inventors
- 👤 Jr James L Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:54
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/16; G03B27/30; G03B27/303; G03D; G03D13/00; G03D13/002; G03D5/00; G03D5/04; G03D7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |