US3421977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal insulation
Assignee: United Kingdom Atomic Energy Authority
•
Filing: 1965-04-16
•
Granted: 1969-01-14
•
Expires: 1985-04-16
Abstract
No abstract record available.
Inventors
- 👤 William George Hutchinson
- 👤 Leslie Charles Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:16
CPC Classifications
G; G21; G21C; G21C11/00; G21C11/08; G21C11/088; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04B1/80; F; F16; F16L; F16L59/00; F16L59/06; G21C11/083; G21C11/085; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12347
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1853374A
Cited
US2710335A
Cited
US2939810A
Cited
US3024525A
Cited
US3190412A
Cited
US3151712A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |