US2937065A
Expired / Lapsed
US
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Assignee: ZELMA D HARZA
•
Filing: 1956-01-09
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Granted: 1960-05-17
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Expires: 1976-01-09
Abstract
No abstract record available.
Inventors
- 👤 Fred H Camphausen
- 👤 Edward W Hillier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:30
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/02; E01C11/04; E01C11/10; E01C11/106; E02; E02B; E02B3/00; E02B3/16; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6806; Y; Y10; Y10S; Y10S24/00; Y10S24/30; Y10S24/51
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1561518A
Cited
US2139851A
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US2228052A
Cited
US2277449A
Cited
US2282829A
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US2321067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |