Patent US3471980A successfully refreshed from Google Patents.
US3471980A
Expired / Lapsed
US
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Method for developing a column
Assignee: Arlo Inc
•
Filing: 1967-10-18
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Granted: 1969-10-14
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Expires: 1987-10-18
Abstract
No abstract record available.
Inventors
- 👤 Bill Archer
- 👤 John Lewis Low
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:49
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/30; E04C3/34; E02; E02D; E02D27/00; E02D27/32; E02D27/52; E04H; E04H12/00; E04H12/02; E04H12/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US989069A
Cited
US1285940A
Cited
US2949705A
Cited
US2812769A
Cited
US2888111A
Cited
US2809415A
Cited
US3196991A
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 |