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 21:32
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3118401A
Cited
US2196423A
Cited
US2124053A
Cited
US2492969A
Cited
US2565553A
Cited
US2680354A
Cited
US2653468A
Cited
US2878665A
Cited
US2815951A
Cited
US2977723A
Cited
US3074080A
Cited
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 |