US3434908A
Expired / Lapsed
US
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Sealing head
Assignee: Summerhayes Holdings Ltd
•
Filing: 1965-11-12
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Granted: 1969-03-25
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Expires: 1985-11-12
Abstract
No abstract record available.
Inventors
- 👤 Warren E Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:09
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C65/305; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/13; B29C66/131; B29C66/20; B29C66/24; B29C66/242; B29C66/2422; B29C66/24221; B29C66/40; B29C66/47; B29C66/474; B29C66/4742; B29C66/47421; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81427; B29C66/81429; B29C66/816; B29C66/8167; B29C66/83; B29C66/832; B29C66/8322; B29C66/81411; B29C66/81415; B29C66/81417; B29C66/81421; B29C66/81422; B29C66/818; B29C66/82; B29C66/824; B29C66/8242; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/84; B31B70/844; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1304; Y10T156/1309
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) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |