US2756996A
Expired / Lapsed
US
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Assignee: Cottrell Co
•
Filing: 1953-08-18
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Granted: 1956-07-31
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Expires: 1973-08-18
Abstract
No abstract record available.
Inventors
- 👤 Hans J Luehrs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:00
CPC Classifications
B; B41; B41F; B41F13/00; B41F13/54; B41F13/70; B65; B65H; B65H29/00; B65H29/02; B65H29/06; B26; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/25; B26D1/34; B26D1/40; B26D1/405; B65H2301/00; B65H2301/40; B65H2301/42; B65H2301/421; B65H2301/4212; B65H2301/42122; B65H2301/44; B65H2301/447; B65H2301/4471; B65H2301/44714; Y; Y10; Y10S; Y10S414/00; Y10S414/10; Y10S414/101
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) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |