US2549445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: VIEWMASTER CORP
•
Filing: 1949-07-27
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Granted: 1951-04-17
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Expires: 1969-07-27
Abstract
No abstract record available.
Inventors
- 👤 Albert H Friess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:09
CPC Classifications
A; A42; A42B; A42B1/00; A42B1/24; A42B1/247; G; G02; G02C; G02C3/00; G02C3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US264574A
Cited
US1313469A
Cited
FR476306A
Cited
US1709765A
Cited
US2004701A
Cited
DE685696C
Cited
US2475471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |