US2445210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of fibro-cementitious sheets
Assignee: Johns Manville Corp
•
Filing: 1945-12-04
•
Granted: 1948-07-13
•
Expires: 1965-12-04
Abstract
No abstract record available.
Inventors
- 👤 Dudley T Colton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:59
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/52; B28B1/521
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US933979A
Cited
US1453382A
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US1534353A
Cited
US1768922A
Cited
US1684525A
Cited
US1931018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-13 | 1952-01-12 | 1952-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-13 | 1956-01-12 | 1956-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-13 | 1960-01-12 | 1960-07-13 | $7700.00 | Window Closed / Lapsed |