US2730241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filters
Assignee: Marvel Engineering Co
•
Filing: 1953-02-09
•
Granted: 1956-01-10
•
Expires: 1973-02-09
Abstract
No abstract record available.
Inventors
- 👤 William A Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:57
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D2201/00; B01D2201/04; B01D2201/0407
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1953759A
Cited
US2173978A
Cited
US2413991A
Cited
US2468862A
Cited
US2439936A
Cited
US2544269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |