Patent US3535019A successfully refreshed from Google Patents.
US3535019A
Expired / Lapsed
US
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Metallized glass reflex-reflecting elements
Assignee: 3M Co
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Filing: 1967-10-25
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Granted: 1970-10-20
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Expires: 1987-10-25
Abstract
No abstract record available.
Inventors
- 👤 Richard A Longlet
- 👤 John Richard Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:02
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/004; C09D157/00; D; D06; D06Q; D06Q1/00; D06Q1/10; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |