Patent US3039575A successfully refreshed from Google Patents.
US3039575A
Expired / Lapsed
US
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Composite grating
Assignee: Capitol Products Corp
•
Filing: 1958-09-03
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Granted: 1962-06-19
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Expires: 1978-09-03
Abstract
No abstract record available.
Inventors
- 👤 Donald C Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:08
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/42; E04C2/427; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49876
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US22035A
Cited
US1494823A
Cited
CH199990A
Cited
GB692941A
Cited
FR1105961A
Cited
GB799166A
Cited
US2923384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |