Patent US3396978A successfully refreshed from Google Patents.
US3396978A
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US
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Shaft seals
Assignee: George Angus and Co Ltd
•
Filing: 1965-06-23
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Granted: 1968-08-13
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Expires: 1985-06-23
Abstract
No abstract record available.
Inventors
- 👤 Balkin Mark
- 👤 Denys G Turner
- 👤 Irving Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:28
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0053; C; C08; C08L; C08L9/00; C08L9/02; F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3284; B29K; B29K2021/00; B29L; B29L2031/00; B29L2031/26; Y; Y10; Y10S; Y10S277/00; Y10S277/924; Y10S277/935; Y10S277/944; Y10S525/00; Y10S525/942
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) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |