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US3475870A
Expired / Lapsed
US
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Partition assemblies
Assignee: Individual
•
Filing: 1968-07-19
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Granted: 1969-11-04
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Expires: 1988-07-19
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Birum Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:12
CPC Classifications
E; E06; E06B; E06B1/00; E06B1/04; E06B1/12; E06B3/00; E06B3/54; E06B3/58; E06B3/5807; E06B3/5821
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA643541A
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US744537A
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US1625637A
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US2867856A
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US2910154A
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US2934800A
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US3016993A
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US3075621A
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US3205630A
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US3256668A
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US3323262A
Cited
US3310920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |