US2808136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partition construction
Assignee: Individual
•
Filing: 1953-01-02
•
Granted: 1957-10-01
•
Expires: 1973-01-02
Abstract
No abstract record available.
Inventors
- 👤 Andrew B Hammitt
- 👤 Jr Herbert L Birum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:27
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/74; E04B2/82; E04B2/825; H; H02; H02G; H02G3/00; H02G3/28; H02G3/286
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1718253A
Cited
US866479A
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US1417102A
Cited
US2237098A
Cited
US2198287A
Cited
GB517107A
Cited
US2390857A
Cited
US2612243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |