US3515549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectrosolographic article and method utilizing diazo material
Assignee: Bell and Howell Co
•
Filing: 1965-09-27
•
Granted: 1970-06-02
•
Expires: 1985-09-27
Abstract
No abstract record available.
Inventors
- 👤 William E Bixby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52; G03G; G03G13/00; G03G13/22; G03G5/00; G03G5/02; G03G5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2939787A
Cited
US3410686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |