US2564440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for viewing and photographing documents
Assignee: MASER
•
Filing: 1949-04-28
•
Granted: 1951-08-14
•
Expires: 1969-04-28
Abstract
No abstract record available.
Inventors
- 👤 Herman G Maser
- 👤 Ernest P Taubes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:40
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/022; G02B27/024; G02B27/025
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2332810A
Cited
US1819883A
Cited
US1838389A
Cited
US1834218A
Cited
US2122710A
Cited
US2121061A
Cited
US2168190A
Cited
US2249228A
Cited
US2372910A
Cited
US2435099A
Cited
US2432704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |