US3224830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential drive for cinematographs
Assignee: Individual
•
Filing: 1962-09-24
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Granted: 1965-12-21
•
Expires: 1982-09-24
Abstract
No abstract record available.
Inventors
- 👤 George A Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:19
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
IN A KINETOGRAPHS, THE COMBINATION OF A FILM DRIVING AND FEEDING MECHANISM AND A FILM EXPOSING SHUTTER, A FILM TAKE-UP MECHANISM THAT PULLS THE FILM ON A FILM RUN FROM THE DRIVING AND FEEDING MECHANISM AND WINDS IT IN A ROLL OF INCREASING SIZE, SURFACE OF SAID MOLD, DEPOSITING A ROUGHENING AGENT ON THE TOP SURFACE OF THE MIXTURE IN SAID MOLDS, HEATING SAID MIXTURE TO CURE SAID POLYMER, SUBJECTING THE MOLDED MARKER TO A BATH OF STRIPPING SOLVENT, AND CLEANING SAID MARKER TO EXPOSE SAID GLASS SPHERES AT THE SURFACE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |