US2504383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflecting type telescope having a spherical mirror
Assignee: Optische Industrie de Oude Delft NV
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Filing: 1945-12-18
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Granted: 1950-04-18
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Expires: 1965-12-18
Abstract
No abstract record available.
Inventors
- 👤 Bouwers Albert
- 👤 Becker Johannes
- 👤 Adriaan Hendrik Van Gorcum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:31
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/02; G02B17/04; G02B17/045; G02B17/08; G02B17/0804; G02B17/0808; G02B17/0884; G02B23/00
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) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |