US2725800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical systems
Assignee: Monotype Corp Ltd
•
Filing: 1952-02-12
•
Granted: 1955-12-06
•
Expires: 1972-02-12
Abstract
No abstract record available.
Inventors
- 👤 Dewhurst Maurice Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:44
CPC Classifications
G; G03; G03B; G03B15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1116069A
Cited
FR860192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |