US2520124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock wool mass
Assignee: United Gas Improvement Co
•
Filing: 1946-03-20
•
Granted: 1950-08-29
•
Expires: 1966-03-20
Abstract
No abstract record available.
Inventors
- 👤 Newcomb K Chaney
- 👤 Claude W Jordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:55
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2068; B01D39/2082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1624163A
Cited
US2400719A
Cited
US2353936A
Cited
US2381369A
Cited
US2372431A
Cited
US2353937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |