US2853816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1956-01-09
•
Granted: 1958-09-30
•
Expires: 1976-01-09
Abstract
No abstract record available.
Inventors
- 👤 John A Rogas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:30
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US158900A
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US1312806A
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US845052A
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US2379030A
Cited
US2503239A
Cited
US2513102A
Cited
US2533441A
Cited
US2617218A
Cited
US2634653A
Cited
US2705437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |