US3446548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supplemental lens attachment for spectacles
Assignee: JOHN L GOOD
•
Filing: 1965-03-26
•
Granted: 1969-05-27
•
Expires: 1985-03-26
Abstract
No abstract record available.
Inventors
- 👤 William David Rummel
- 👤 John L Good
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:02
CPC Classifications
G; G02; G02C; G02C9/00; G02C7/00; G02C7/02; G02C7/08; G02C7/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US732251A
Cited
US786442A
Cited
US2252292A
Cited
US2326787A
Cited
US2486881A
Cited
FR66237E
Cited
US2714717A
Cited
US2842029A
Cited
US3147488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |