Patent US3523027A successfully refreshed from Google Patents.
US3523027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collagen casings strengthened by treatment with the dialdehyde of a polysaccharide containing carboxyl groups
Assignee: Lever Brothers Co
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Filing: 1969-02-03
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Granted: 1970-08-04
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Expires: 1989-02-03
Abstract
No abstract record available.
Inventors
- 👤 David Neville Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:32
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; A22C13/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |