US2670665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system for photographic composing apparatus
Assignee: GRAPHIC ARTS RES FOUNDATION IN
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Filing: 1950-03-10
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Granted: 1954-03-02
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Expires: 1970-03-10
Abstract
No abstract record available.
Inventors
- 👤 Samuel H Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:12
CPC Classifications
B; B41; B41B; B41B21/00; B41B21/16; B41B21/18; B41B21/20
Claims Analysis
Total Claims: 0
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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) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |