Patent US3441735A successfully refreshed from Google Patents.
US3441735A
Expired / Lapsed
US
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Boundary follower using oscillating photocells
Assignee: BOC Group Ltd
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Filing: 1965-10-22
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Granted: 1969-04-29
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Brian Edmund King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:46
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/12; B23Q35/127; B23Q35/128; G; G06; G06K; G06K11/00; G06K11/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3069550A
Cited
US3209152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |