Patent US2423237A successfully refreshed from Google Patents.
US2423237A
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Method of heat sealing
Assignee: Individual
•
Filing: 1941-11-01
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Granted: 1947-07-01
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Expires: 1961-11-01
Abstract
No abstract record available.
Inventors
- 👤 Alfred B Haslacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:12
CPC Classifications
B; B65; B65B; B65B51/00; B65B51/10; B65B51/20; B29; B29C; B29C65/00; B29C65/02; B29C65/10; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/43121; B29C66/43122; B29C66/432; B29C66/4322; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/82; B29C66/826; B29C66/8266; B29C66/84; B29C66/849; B29C66/861; B29C66/87; B29C66/874; B29C66/8744; B29C66/87441; B29C66/72; B29C66/723; B29C66/7232; B29C66/72327; B29C66/72328; B29C66/90; B29C66/92; B29C66/924; B29C66/9241; B29L; B29L2031/00; B29L2031/712; B29L2031/7162; B29L2031/7166
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1141932A
Cited
US1546963A
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US2093491A
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US2220545A
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US2155614A
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US2229329A
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US2273452A
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US2293568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-30 | 1950-12-30 | 1951-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-30 | 1954-12-30 | 1955-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-30 | 1958-12-30 | 1959-07-01 | $7700.00 | Window Closed / Lapsed |