Patent US540794A successfully refreshed from Google Patents.
Patent US3513675A successfully refreshed from Google Patents.
US3513675A
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US
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Assignee: WALTER E HAYWARD CO Inc
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Filing: 1968-05-28
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Granted: 1970-05-26
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Expires: 1988-05-28
Abstract
No abstract record available.
Inventors
- 👤 Frank J Ryder Jr
- 👤 T Lawson Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:20
CPC Classifications
A; A44; A44B; A44B15/00; Y; Y10; Y10T; Y10T70/00; Y10T70/80; Y10T70/8432; Y10T70/8676; Y10T70/8757
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE544618A
Cited
US905731A
Cited
FR392235A
Cited
FR596975A
Cited
US1859176A
Cited
US2129436A
Cited
US2986788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |