Patent US2473190A successfully refreshed from Google Patents.
US2473190A
Expired / Lapsed
US
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Method of producing fibrous building compositions
Assignee: Standard Oil Development Co
•
Filing: 1944-07-01
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Granted: 1949-06-14
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Expires: 1964-07-01
Abstract
No abstract record available.
Inventors
- 👤 Charles M Baskin
- 👤 Norman W Mcleod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:30
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/61; D21J; D21J1/00; D21J1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1657585A
Cited
US1754343A
Cited
US1812515A
Cited
US2132607A
Cited
US2216311A
Cited
US2072686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |