Patent US3490186A successfully refreshed from Google Patents.
US3490186A
Expired / Lapsed
US
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Modular building with curved precast concrete walls
Assignee: JAMES S HAMMOND
•
Filing: 1968-02-29
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Granted: 1970-01-20
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Expires: 1988-02-29
Abstract
No abstract record available.
Inventors
- 👤 James S Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:54
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/20; E04H; E04H9/00; E04H9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA492169A
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CA687106A
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US1045521A
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US1618886A
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GB557078A
Cited
US2351856A
Cited
US3195312A
Cited
US3350824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |