Patent US2743759A successfully refreshed from Google Patents.
US2743759A
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Method of making a corrugated fabric duct
Assignee: National Motor Bearing Co Inc
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Filing: 1954-11-01
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Granted: 1956-05-01
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Expires: 1974-11-01
Abstract
No abstract record available.
Inventors
- 👤 Snow Jack Norman
- 👤 Greenwald Fred Alton
- 👤 Ticknor William Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:48
CPC Classifications
B; B29; B29D; B29D23/00; B29D23/18; B21; B21F; B21F17/00; B29C; B29C49/00; B29C49/0042; B29K; B29K2021/00; B29L; B29L2023/00; B29L2023/18; Y; Y10; Y10S; Y10S264/00; Y10S264/52; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043
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) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |