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US2651408A
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Assignee: 3M Co
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Filing: 1949-08-15
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Granted: 1953-09-08
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Expires: 1969-08-15
Abstract
No abstract record available.
Inventors
- 👤 Donald W Engberg
- 👤 Walter A Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:02
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/21; C09J2301/00; C09J2301/10; C09J2301/18; C09J2400/00; C09J2400/20; C09J2400/26; C09J2400/263; Y; Y10; Y10S; Y10S206/00; Y10S206/82; Y10T; Y10T428/00; Y10T428/16; Y10T428/163; Y10T428/17; Y10T428/18; Y10T428/24; Y10T428/24355; Y10T428/24446; Y10T428/24455; Y10T428/26; Y10T428/266; Y10T428/27; Y10T428/28; Y10T428/2852; Y10T428/2857; Y10T428/2878; Y10T428/2891; Y10T442/00; Y10T442/20; Y10T442/2738; Y10T442/2754
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) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |