US2931591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reel
Assignee: Individual
•
Filing: 1957-04-17
•
Granted: 1960-04-05
•
Expires: 1977-04-17
Abstract
No abstract record available.
Inventors
- 👤 Zorn Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:15
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/321; G03B21/326; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/67; G11B15/674
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1578894A
Cited
US2373704A
Cited
GB637371A
Cited
US2484100A
Cited
US2542186A
Cited
US2638284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |