US3420022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete insulation blanket
Assignee: WAYNE C BROCK
•
Filing: 1966-09-20
•
Granted: 1969-01-07
•
Expires: 1986-09-20
Abstract
No abstract record available.
Inventors
- 👤 Wayne C Brock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:39
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/24; E04G21/28; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/239
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2853399A
Cited
US2971616A
Cited
US2956310A
Cited
US2927626A
Cited
US3246443A
Cited
US3162566A
Cited
US3192099A
Cited
US3264165A
Cited
US3350553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |