Patent US3540580A successfully refreshed from Google Patents.
US3540580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-seal adhesive and package
Assignee: Hexion Inc
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Filing: 1967-07-03
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Granted: 1970-11-17
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Expires: 1987-07-03
Abstract
No abstract record available.
Inventors
- 👤 Peter Spiros Columbus
- 👤 Eva Marie Scharfy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:07
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/48; A61F; A61F13/00; A61F13/00051; A61F13/00072; A61F13/00076; A61F13/02; A61F13/0246; A61F13/0253; A61L15/58; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249985; Y10T428/29
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |