US2929309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum frame mask for photographic reproduction
Assignee: Individual
•
Filing: 1956-11-02
•
Granted: 1960-03-22
•
Expires: 1976-11-02
Abstract
No abstract record available.
Inventors
- 👤 Mervin W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:01
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/18; G03B27/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US658839A
Cited
US708770A
Cited
US1103331A
Cited
US1277318A
Cited
US2173168A
Cited
US2342525A
Cited
US2386888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |