Patent US2984945A successfully refreshed from Google Patents.
US2984945A
Expired / Lapsed
US
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Interlocking roof tiles
Assignee: Putnam Rolling Ladder Co Inc
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Filing: 1958-04-02
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Granted: 1961-05-23
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Expires: 1978-04-02
Abstract
No abstract record available.
Inventors
- 👤 Edna S Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:57
CPC Classifications
E; E04; E04D; E04D1/00; E04D1/02; E04D1/29; E04D1/2907; E04D1/2914; E04D1/2916; E04D1/30; E04D13/00; E04D13/15; E04D13/158; E04D2001/301; E04D2001/302; E04D2001/303; E04D2001/304; E04D2001/305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |