Patent US3381431A successfully refreshed from Google Patents.
US3381431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mullion device for window
Assignee: Individual
•
Filing: 1967-06-02
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Granted: 1968-05-07
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Expires: 1987-06-02
Abstract
No abstract record available.
Inventors
- 👤 Allan I Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:06
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/68; E06B3/685
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA712378A
Cited
US2132217A
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US2408281A
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US2627632A
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US2681481A
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US3099865A
Cited
US3108336A
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US3254465A
Cited
US3221462A
Cited
US3293817A
Cited
US3340661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |