US2937566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strip film and viewer
Assignee: Individual
•
Filing: 1957-05-13
•
Granted: 1960-05-24
•
Expires: 1977-05-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert E Ward
- 👤 Joan M Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:17
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/06; G03; G03B; G03B15/00; G03B15/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US700709A
Cited
US713312A
Cited
US1010228A
Cited
US1787592A
Cited
US1828808A
Cited
US1994340A
Cited
US2228378A
Cited
FR912104A
Cited
FR1037503A
Cited
DE921734C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |