US3533189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-aligning swing gate system
Assignee: Anchor Post Products Inc
•
Filing: 1968-11-18
•
Granted: 1970-10-13
•
Expires: 1988-11-18
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G Appell
- 👤 Robert R Brannan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:26
CPC Classifications
E; E06; E06B; E06B11/00; E06B11/02; E06B11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US498124A
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US572228A
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US1200879A
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US1283359A
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US1330680A
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US1443446A
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US1634337A
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US1731028A
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US2665508A
Cited
US2778052A
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US2970799A
Cited
US3375544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |