US2856039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building construction
Assignee: Individual
•
Filing: 1954-03-04
•
Granted: 1958-10-14
•
Expires: 1974-03-04
Abstract
No abstract record available.
Inventors
- 👤 Harold G Hawkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:09
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/02; E04B1/14; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US745000A
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US1967611A
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US2158234A
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DE702818C
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US2131268A
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US2145469A
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US2234517A
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GB617621A
Cited
US2644552A
Cited
US2691433A
Cited
US2659461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |