US2883908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflecting and magnifying viewer
Assignee: Individual
•
Filing: 1957-06-20
•
Granted: 1959-04-28
•
Expires: 1977-06-20
Abstract
No abstract record available.
Inventors
- 👤 Jacob C Copeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:47
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/022; G02B27/024; G02B27/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2229302A
Cited
FR875974A
Cited
GB544694A
Cited
CH242881A
Cited
US2490747A
Cited
US2590657A
Cited
US2619872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |