US2856871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: KEYSTONE FLASHING Co
•
Filing: 1954-06-14
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Granted: 1958-10-21
•
Expires: 1974-06-14
Abstract
No abstract record available.
Inventors
- 👤 Herbert P Orth
- 👤 Anthony F Dzwonkas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:11
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/14; E04D13/1407; E04D13/1415
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1726500A
Cited
US2021883A
Cited
US2105996A
Cited
US2271710A
Cited
US2250548A
Cited
US2469840A
Cited
US2641203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |