US3458348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent coated optical element
Assignee: 3M Co
•
Filing: 1966-05-31
•
Granted: 1969-07-29
•
Expires: 1986-05-31
Abstract
No abstract record available.
Inventors
- 👤 Patsy O Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:03
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; Y; Y10; Y10T; Y10T428/00; Y10T428/31; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2311613A
Cited
US2571687A
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US2803615A
Cited
US3042542A
Cited
US3068187A
Cited
US3081192A
Cited
US3282905A
Cited
US3097106A
Cited
US3384627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |