US3172377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bomb shelter building
Assignee: Individual
•
Filing: 1961-04-06
•
Granted: 1965-03-09
•
Expires: 1981-04-06
Abstract
No abstract record available.
Inventors
- 👤 John A Dewar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:12
CPC Classifications
E; E04; E04H; E04H9/00; E04H9/04; E04H9/06; E04H9/08; Y; Y10; Y10T; Y10T137/00; Y10T137/8811
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US310490A
Cited
US2212757A
Cited
FR860202A
Cited
CH258792A
Cited
FR1005873A
Cited
US2690074A
Cited
US2715756A
Cited
US2931382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |