Patent US2120309A successfully refreshed from Google Patents.
US2120309A
Expired / Lapsed
US
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Method of applying noncorrosive surfaces to pipe and the like
Assignee: AMERICAN CONCRETE AND STEEL PI
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Filing: 1935-11-11
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Granted: 1938-06-14
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Expires: 1955-11-11
Abstract
No abstract record available.
Inventors
- 👤 Francis L Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:24
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; B; B05; B05D; B05D7/00; B05D7/22; C04B41/45; C04B41/46; C04B41/48; C04B41/60; C04B41/61; C04B41/62; C04B41/63
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-06-13 | 1941-12-13 | 1942-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-06-13 | 1945-12-13 | 1946-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-06-13 | 1949-12-13 | 1950-06-14 | $7700.00 | Window Closed / Lapsed |