Patent US3227061A successfully refreshed from Google Patents.
US3227061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underground building
Assignee: Individual
•
Filing: 1963-05-13
•
Granted: 1966-01-04
•
Expires: 1983-05-13
Abstract
No abstract record available.
Inventors
- 👤 Julian H Swayze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:59
CPC Classifications
E; E04; E04H; E04H9/00; E04H9/04; E04H9/10; E04H9/12; Y; Y10; Y10S; Y10S454/00; Y10S454/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2565553A
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US2680354A
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US2653468A
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US2878665A
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US2815951A
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US2977723A
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US3074080A
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US3103154A
Cited
US3180978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |