Patent US3486564A successfully refreshed from Google Patents.
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 10:01
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/84; E02F3/844
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2713727A
Cited
US2893134A
Cited
US2904911A
Cited
US3029715A
Cited
US2926530A
Cited
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 |