US3486564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical reference system
Assignee: Caterpillar Inc
•
Filing: 1969-02-24
•
Granted: 1969-12-30
•
Expires: 1989-02-24
Abstract
No abstract record available.
Inventors
- 👤 Russell D Page
- 👤 Dean C Klingaman
- 👤 William H Belke
- 👤 John W Crayton
- 👤 Rolland D Scholl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:06
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/84; E02F3/844
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2713727A
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US2893134A
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US2904911A
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US3029715A
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US2926530A
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US3096591A
Cited
US3094796A
Cited
US3171213A
Cited
US3271650A
Cited
US3229391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |