US2469603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building construction
Assignee: Keppel LeTourneau USA Inc
•
Filing: 1943-02-15
•
Granted: 1949-05-10
•
Expires: 1963-02-15
Abstract
No abstract record available.
Inventors
- 👤 Tourneau Robert G Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:53
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/32; E04B2001/3258; E04B2001/3264
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US318324A
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US625258A
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US795984A
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FR701339A
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US2012964A
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FR808234A
Cited
US2166577A
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US2267912A
Cited
GB517548A
Cited
GB527272A
Cited
US2273601A
Cited
US2356768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |