Patent US3517891A successfully refreshed from Google Patents.
US3517891A
Expired / Lapsed
US
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Inflatable textile winder
Assignee: Northrop Grumman Systems Corp
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Filing: 1968-08-05
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Granted: 1970-06-30
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Expires: 1988-08-05
Abstract
No abstract record available.
Inventors
- 👤 Steve E Zeis
- 👤 Ralph A Caneer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:58
CPC Classifications
B; B65; B65H; B65H63/00; B65H63/02; B65H63/024; B65H63/036; B65H63/0364; B65H63/0366; B65H75/00; B65H75/02; B65H75/18; B65H75/24; B65H75/242; B65H75/243; B65H75/2437; B65H2701/00; B65H2701/30; B65H2701/31
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) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |