US2771136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hatch-cover
Assignee: INT MACGREGOR ORG
•
Filing: 1955-03-28
•
Granted: 1956-11-20
•
Expires: 1975-03-28
Abstract
No abstract record available.
Inventors
- 👤 Lecomte Claude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:01
CPC Classifications
E; E21; E21D; E21D15/00; E21D15/14; E21D15/28; E21D15/42; B; B60; B60J; B60J7/00; B60J7/02; B60J7/04; B60J7/041; B61; B61D; B61D39/00; B61D39/002; B61D39/006; B63; B63B; B63B19/00; B63B19/12; B63B19/14; B63B19/18; E21D15/50; E21D15/502
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US834287A
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US2268192A
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US2590985A
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US2574312A
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US2641214A
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US2633613A
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US2614627A
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FR1022707A
Cited
FR1034395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |