US2857555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposure timing for use with photographic printing apparatus
Assignee: Individual
•
Filing: 1953-10-20
•
Granted: 1958-10-21
•
Expires: 1973-10-20
Abstract
No abstract record available.
Inventors
- 👤 Koen Floyd
- 👤 Ellison Wesley Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:34
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/04; G03B27/08; H; H03; H03K; H03K17/00; H03K17/28; H03K17/288
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1939243A
Cited
US2258994A
Cited
US2293425A
Cited
US2298344A
Cited
US2417023A
Cited
US2561535A
Cited
US2463985A
Cited
US2654858A
Cited
US2668474A
Cited
US2607266A
Cited
US2666858A
Cited
US2749799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |