US2988979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposure apparatus for photosensitive materials
Assignee: Fairchild Semiconductor Corp
•
Filing: 1958-08-21
•
Granted: 1961-06-20
•
Expires: 1978-08-21
Abstract
No abstract record available.
Inventors
- 👤 Sigler Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/18; G03B27/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2173168A
Cited
US2591449A
Cited
US2774289A
Cited
US2739516A
Cited
US2836099A
Cited
US2826976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |