US3473870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereoscopic continuous filmstrip apparatus
Assignee: Individual
•
Filing: 1968-03-08
•
Granted: 1969-10-21
•
Expires: 1988-03-08
Abstract
No abstract record available.
Inventors
- 👤 Stephen A Platt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:08
CPC Classifications
G; G02; G02B; G02B30/00; G02B30/20; G02B30/34; Y; Y10; Y10S; Y10S353/00; Y10S353/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2380088A
Cited
US3206757A
Cited
US3244471A
Cited
FR1359359A
Cited
US3265457A
Cited
US3278252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |