US2940591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: 3M Co
•
Filing: 1958-08-22
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Granted: 1960-06-14
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Expires: 1978-08-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank Swedish
- 👤 William H O'brien
- 👤 Lloyd E Picard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:42
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/21; C09J2203/00; C09J2203/31; C09J2400/00; C09J2400/20; C09J2400/28; C09J2400/283; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24446; Y10T428/24455; Y10T428/27; Y10T428/28
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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |