US2755293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating materials
Assignee: Barber Greene Co
•
Filing: 1951-12-04
•
Granted: 1956-07-17
•
Expires: 1971-12-04
Abstract
No abstract record available.
Inventors
- 👤 Mcdonald Dan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:44
CPC Classifications
C; C11; C11B; C11B1/00; C11B1/10; C02; C02F; C02F1/00; C02F1/26; C02F1/38; C02F1/385; Y; Y10; Y10S; Y10S159/00; Y10S159/25; Y10S494/00; Y10S494/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US169927A
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US693316A
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US1887476A
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US2021081A
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US2067800A
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US2599619A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |