Patent US3087845A successfully refreshed from Google Patents.
US3087845A
Expired / Lapsed
US
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Method of forming seals in plastic articles
Assignee: WR Grace and Co
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Filing: 1958-09-18
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Granted: 1963-04-30
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Expires: 1978-09-18
Abstract
No abstract record available.
Inventors
- 👤 William A Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:38
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/70; B29C66/73; B29C66/737; B29C66/7371; B29C65/00; B29C65/02; B29C65/14; B29C65/1429; B29C65/1445; B29C65/1448; B29C65/1464; B29C65/18; B29C65/74; B29C65/743; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/137; B29C66/344; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/71; B29C66/73711; B29C66/73713; B29C66/73715; B29C66/7375; B29C66/73753; B29C66/73754; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/82; B29C66/824; B29C66/8242; B29C66/83; B29C66/832; B29C66/8322; B29C66/83221; B29C49/00; B29C49/02; B29C49/06905; B29C49/0691; B29C49/06916; B29C65/22; B29C65/221; B29C65/222; B29C66/431; B29C66/4312; B29C66/43121; B29C66/7394; B29C66/73941; B29K; B29K2995/00; B29K2995/0037; B29K2995/0049; B29K2995/005; B29K2995/0053; B29L; B29L2031/00; B29L2031/712; B29L2031/7128; Y; Y10; Y10T; Y10T428/00; Y10T428/15; Y10T428/24; Y10T428/24777
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
SUPERPOSED LAYERS OF A CROSS-LINKED POLYMER, EACH OF SAID LAYERS HAVING A PORTION LAMINATION TO THE OTHER LAYER AND A PORTION NONLAMINATED TO THE OTHER LAYER SAID LAYERS HAVING A SHRINK ENERGY OF AT LEAST 100 P.S.I. IN THE NONLAMINATED PORTION THEREOF AND HAVING SUBSTANTIALLY NO SHRINK ENERGY IN THE LAMINATED PORTION THEREOF, SAID LAMINATED PORTION HAVING A FAINT LINE OF DEMARCATION INDICATING THE AREA OF LAMINATION, SAID LAMINATED PORTION BEING SUBSTANTIALLY RECTANGULAR IN CROSS SECTION.
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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |