US3520845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating sheet material comprising high temperature-resistant polymers with oriented inorganic flakes dispersed therein
Assignee: 3M Co
•
Filing: 1969-05-01
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Granted: 1970-07-21
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Expires: 1989-05-01
Abstract
No abstract record available.
Inventors
- 👤 James J Mckeown
- 👤 Michael E Toner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:30
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; C; C08; C08K; C08K3/00; C08K3/34; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/251
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2984590A
Cited
US2175715A
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US2454210A
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US2477791A
Cited
US2459018A
Cited
US3024701A
Cited
US2981980A
Cited
US3087912A
Cited
US3028266A
Cited
US3234181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |