US2872882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor resisting roof structure
Assignee: Minnesota and Ontario Paper Co
•
Filing: 1954-05-13
•
Granted: 1959-02-10
•
Expires: 1974-05-13
Abstract
No abstract record available.
Inventors
- 👤 Robert E Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:19
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/35; E04D3/351; E04D3/355; E04D13/00; E04D13/16; E04D3/354
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US396292A
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FR976137A
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US2808624A
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US2754776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |