US3520601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable projection assembly
Assignee: Rank Organization Ltd
•
Filing: 1967-02-23
•
Granted: 1970-07-14
•
Expires: 1987-02-23
Abstract
No abstract record available.
Inventors
- 👤 Donald Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:09
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/16; G03B21/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1966531A
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US1989336A
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US2229760A
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US2243160A
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US2252513A
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US2362601A
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US2461756A
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US2614458A
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US2597449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |