Patent US2903142A successfully refreshed from Google Patents.
US2903142A
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US
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Control mechanism for swingable booms
Assignee: SHAWNEE Manufacturing Co Inc
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Filing: 1956-01-16
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Granted: 1959-09-08
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Expires: 1976-01-16
Abstract
No abstract record available.
Inventors
- 👤 Marion C Wills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:08
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/38; E02F3/382; E02F3/384
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1311234A
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US1492223A
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US2528985A
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US2698697A
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US2672990A
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US2718312A
Cited
US2755939A
Cited
US2669397A
Cited
US2768499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |