US3509441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor braking circuit
Assignee: Acme Visible Records Inc
•
Filing: 1967-05-11
•
Granted: 1970-04-28
•
Expires: 1987-05-11
Abstract
No abstract record available.
Inventors
- 👤 Newell G Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:12
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/08; H02P3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2605454A
Cited
US3017555A
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GB945249A
Cited
US3188547A
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US3286148A
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US3273018A
Cited
US3328606A
Cited
US3398343A
Cited
US3365642A
Cited
US3403314A
Cited
US3395334A
Cited
US3421063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-27 | 1973-10-27 | 1974-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-27 | 1977-10-27 | 1978-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-27 | 1981-10-27 | 1982-04-28 | $7700.00 | Window Closed / Lapsed |