Patent US2535027A successfully refreshed from Google Patents.
US3472730A
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US
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Heat-curable filament-reinforced resinous sheeting and laminating process using same
Assignee: 3M Co
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Filing: 1967-12-28
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Granted: 1969-10-14
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Expires: 1987-12-28
Abstract
No abstract record available.
Inventors
- 👤 Robert A Frigstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:35
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/086; B29C70/003; B29K; B29K2009/00; B29K2101/00; B29K2101/10; B29K2307/00; B29K2309/00; B29K2309/08; B29K2995/00; B29K2995/0037; B29K2995/0089; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/249933; Y10T428/249937; Y10T428/26; Y10T428/263
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |