US2789582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible spectacle line-blind
Assignee: Individual
•
Filing: 1954-07-13
•
Granted: 1957-04-23
•
Expires: 1974-07-13
Abstract
No abstract record available.
Inventors
- 👤 Clinton H Dunham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:30
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/30; F16K3/312
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US442458A
Cited
US1391987A
Cited
US1727677A
Cited
US2045086A
Cited
US2532346A
Cited
US2649117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |