US3373074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal roof insulation and method of preparing an insulated built-up roof
Assignee: Pittsburgh Corning LLC
•
Filing: 1965-07-27
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Granted: 1968-03-12
•
Expires: 1985-07-27
Abstract
No abstract record available.
Inventors
- 👤 Dominic D Eustachio
- 👤 Howard E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:49
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/16; E04D13/1606; E04D13/1668; E04D11/00; E04D11/02; E04D3/00; E04D3/35; E04D3/351; E04D3/352; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249974; Y10T428/249976; Y10T428/249987; Y10T428/25; Y10T428/252; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |