Patent US4530040A successfully refreshed from Google Patents.
Patent US3707416A successfully refreshed from Google Patents.
US3707416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skewed billets for making louvered films
Assignee: 3M Co
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Filing: 1970-10-30
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Granted: 1972-12-26
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Expires: 1990-10-30
Abstract
Abstract METHOD AND APPARATUS ARE DESCRIBED FOR FORMING A SKEWED BILLET FROM COATED FILM MOUNTED AROUND A SHAFT AND DEFORMED SO THAT THE TRANSVERSE COATINGS ASSUME CONICAL FORMS WITH ANGLES OF 5* TO 50*.
Inventors
- 👤 Edward J Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:29
CPC Classifications
B; B32; B32B; B32B37/00; B26; B26D; B26D3/00; B26D3/006; B26D3/008; B29; B29B; B29B11/00; B29B11/04; B29B11/06; B29B11/12; B29C; B29C67/00; H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J29/896; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1044; Y10T156/1052; Y10T156/1061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |