Patent US3455076A successfully refreshed from Google Patents.
US3455076A
Expired / Lapsed
US
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Roofing membrane with fibrous reinforcing material
Assignee: Johns Manville Corp
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Filing: 1967-08-01
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Granted: 1969-07-15
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Expires: 1987-08-01
Abstract
No abstract record available.
Inventors
- 👤 George W Clarvoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:49
CPC Classifications
E; E04; E04D; E04D5/00; E04D5/12; E04D13/00; E04D13/17; E04D13/172; E04D5/10; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/2457
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2246101A
Cited
US2389210A
Cited
US2961029A
Cited
US3002868A
Cited
FR1297466A
Cited
US3237361A
Cited
US3280528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |