Patent US3472528A successfully refreshed from Google Patents.
US3472528A
Expired / Lapsed
US
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Convertible category implement tractor hitch
Assignee: MASSEY COMBINES Corp A CORP OF ONTARIO
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Filing: 1967-10-26
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Granted: 1969-10-14
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Expires: 1987-10-26
Abstract
No abstract record available.
Inventors
- 👤 Clarence B Richey
- 👤 Ronald E Rasmussen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:20
CPC Classifications
A; A01; A01B; A01B59/00; A01B59/06; A01B59/066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2527613A
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GB767210A
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GB771600A
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US2873125A
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GB870883A
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US3066952A
Cited
US3031208A
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US3151883A
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US3226818A
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US3391949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |