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US3493780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device
Assignee: Millennium Petrochemicals Inc
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Filing: 1967-11-22
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Granted: 1970-02-03
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Expires: 1987-11-22
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G Wiggs
- 👤 Karl H Emich
- 👤 Richard E Wiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:32
CPC Classifications
B; B23; B23Q; B23Q15/00; F; F16; F16P; F16P3/00; F16P3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |