Patent US2829570A successfully refreshed from Google Patents.
US2829570A
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Apparatus for grouping envelopes and like flat articles
Assignee: PEARCE DEV Co
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Filing: 1956-07-19
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Granted: 1958-04-08
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Expires: 1976-07-19
Abstract
No abstract record available.
Inventors
- 👤 Lewis C Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:04
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/32; B65H3/322; B65H3/327; B65H1/00; B65H1/02; B65H1/025; B65H33/00; B65H33/02; B65H2301/00; B65H2301/30; B65H2301/32; B65H2301/321; B65H2701/00; B65H2701/10; B65H2701/19; B65H2701/1916
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2729151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |