Patent US3540972A successfully refreshed from Google Patents.
US3540972A
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Carrousel sealing apparatus for tower packing bundles
Assignee: Dow Chemical Co
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Filing: 1969-01-16
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Granted: 1970-11-17
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Expires: 1989-01-16
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Irwin
- 👤 Wilbur G Freer Jr
- 👤 William A Doidge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:47
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/78; B29C66/00; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/43121; B29C66/432; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/13; B29C66/137; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1744; Y10T156/1768; Y10T156/1771; Y10T156/1773
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3455768A
Cited
US3243334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |