US3507818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealants for fluid containers
Assignee: West Chester Chemical Co Inc
•
Filing: 1966-06-16
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Granted: 1970-04-21
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Expires: 1986-06-16
Abstract
No abstract record available.
Inventors
- 👤 Robert Lee Roach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:54
CPC Classifications
C; C08; C08L; C08L11/00; C08L11/02; C09; C09K; C09K3/00; C09K3/12
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) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |