US3491901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brick stacker
Assignee: PEARNE & LACY MACHINE COMPANY INC A CORP OF N C
•
Filing: 1967-02-14
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Granted: 1970-01-27
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Expires: 1987-02-14
Abstract
No abstract record available.
Inventors
- 👤 Florentin J Pearne
- 👤 Frank S Pearne
- 👤 Frederick G Robson
- 👤 Jack R Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:48
CPC Classifications
B; B65; B65G; B65G57/00; B65G57/02; B65G57/03; B65G57/035; B65B; B65B35/00; B65B35/30; B65B35/50; Y; Y10; Y10S; Y10S414/00; Y10S414/10; Y10S414/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US732221A
Cited
US2710696A
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US2883074A
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US2933207A
Cited
US2956381A
Cited
GB914957A
Cited
US3262594A
Cited
US3270897A
Cited
US3392851A
Cited
US3388815A
Cited
US3404788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |