US2773458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roofs for storage tanks or similar structures
Assignee: Individual
•
Filing: 1953-02-19
•
Granted: 1956-12-11
•
Expires: 1973-02-19
Abstract
No abstract record available.
Inventors
- 👤 Foster Robert Henry
- 👤 Mclean James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:11
CPC Classifications
E; E04; E04H; E04H7/00; E04H7/02; E04H7/04; E04H7/06; E04H7/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1543131A
Cited
GB252936A
Cited
US1748222A
Cited
US2187616A
Cited
US2288809A
Cited
US2327085A
Cited
GB590294A
Cited
US2532854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |