Patent US4000525A successfully refreshed from Google Patents.
US3520846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene terephthalate film containing cobaltous aluminate
Assignee: EIDP Inc
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Filing: 1966-11-01
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Granted: 1970-07-21
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Expires: 1986-11-01
Abstract
No abstract record available.
Inventors
- 👤 Richard Jay England
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A COMPOSITION COMPRISING POLYETHYLENE TEREPHTHATE AND COBALTOUS ALUMINATE, THE COMPOSITION BEING CHARACTERIZED BY A SUBSTANTIALLY NEUTRAL HUE.
Claim 2
Dependent Claim
17 words
A COMPOSITION COMPRISING POLYETHYLENE TEREPHTHATE AND COBALTOUS ALUMINATE, THE COMPOSITION BEING CHARACTERIZED BY A SUBSTANTIALLY NEUTRAL HUE.
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) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |