Patent US3147874A successfully refreshed from Google Patents.
US3147874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for crown closures
Assignee: WR Grace and Co
•
Filing: 1961-04-03
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Granted: 1964-09-08
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Expires: 1981-04-03
Abstract
No abstract record available.
Inventors
- 👤 Donald D Hundt
- 👤 Edward W Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:22
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/02; B65D41/10; B65D41/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
IN A METAL CROWN CLOSURE, A COMPLEMENTARY CIRCULAR SEAL THEREIN COMPRISING A WATERPROOFED PAPER LAMINA, A BONDED THIN GAS-IMPERMEABLE PLASTIC FILM, A TOUGH POLYOLEFIN PLASTIC FILM BONDED THERETO, AND AN ADHERING RESILIENT
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US2516647A
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US2601318A
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US2626073A
Cited
US2777411A
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US2901139A
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |